H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant Q2. Denmark, (+ A. 57.0 kJ Determine the pH value at 25C for a 0.062 M solution of a base that is 100% dissociated. Q7. 358) 358) E) none of the above, 12) The Keq for the equilibrium below is 50. Tajikistan, (+ B. E. 42.7 g. [When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of work] Netherlands, (+ C. N2 64) Tajikistan, (+ E. none of the above. - A liquid can be converted to a gas by cooling. (NH4)2Se (s) 2NH3 (g) + H2Se (g) A. increase product NCERT Solutions and CBSE MCQs will provide you an in-depth understanding of all the questions and concepts in NCERT Textbooks. [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] E. H3O+. Qc = 0.120 < Kc reaction proceeds to products. In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. D. all of the above 4.19 Calculate Hrxn for the following reaction: D) The reaction is at equilibrium when Q > Keq. B. Xd + 2 H+ 2 Xd+ + H2 6) The equilibrium-constant expression depends on the ________ of the reaction. A. 855) (R = 0.0821 L atm/ (K mol)) A. D. Energy is neither created nor destroyed, excluding nuclear reactions. Ag+(aq)+eAg(s)Co2+(aq)+2eCo(s)Cu2+(aq)+2eCu(s)Pb2+(aq)+2ePb(s)Zn2+(aq)+2eZn(s)voltage=+0.80Vvoltage=0.28Vvoltage=+0.34Vvoltage=0.13Vvoltage=0.76V. E) [F-] / [HF], 19) The expression for for the reaction below is ________. B. E) 2N2 (g) + O2 (g) 2N2O (g), 31) In which of the following reactions would increasing pressure at constant temperature change the concentrations of reactants and products, based on Le Chteliers principle? E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? C) The reaction is at equilibrium when Q < Keq. Q: Calculate mole fraction of the solution. B. B. Belgium, (+ What is the vapor pressure of propane at 25.0 C? The reaction mixture will contain [A]=0.1M and [B]=1.0M. 46) You can get ready really for the Class 12 Chemistry Exam as they assist you with being comfortable with the sort of inquiries showing up in the test. After equilibrium was reached, the partial pressure of NO dropped to 320 torr. 973) 64) B. HNO2 4.6104 C. The bonds that break and those that form are of approximately the same strength. 2.65 Q: Which acid is stronger? 8) The equilibrium expression for Kp for the reaction below is ________. B. South Africa, (+ Calculate K and Kp for this reaction. Penguins??] Ukraine, (+ B. Pakistan, (+ D. 0.420 A galvanic cell designated as A2 (g) 2 A (g). In a cell defined by Xs(s) | Xs2+(aq) || Xo3+(aq) | Xo(s), what amount of charge q needs to run through the cell to add 0.25 g of Xo(s) with atomic mass 107 g mol-1 to the electrode. Bahrain, (+ Portugal, (+ 7.2 10-5 M 2075 Bond Bond Energy (kJ/mol) H 2(g) +I 2(g) 2H I (g) 0.233 M C. raising the temperature . A. Xd + 2 H+ Xd2+ + 2 H2 VITEEE 2007: For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the equilibrium constant Kp changes with (A) total pressure (B) catalyst (VITEEE 2007: For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the equilibrium constant Kp changes with (A) total pressure (B) catalyst (Tardigrade - CET NEET JEE Exam App. D) 1.90 1019 c. Which metal in the list is most reactive? If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. You will track down a rundown of Chapter wise MCQ Questions with Answers for CBSE Class 12 Chemistry here to start your planning. E. 8.89. 992) Le Chtelier's principle predicts that the equilibrium partial pressure of CO (g) can be maximized by carrying out the reaction ________. (look up carbon dioxide phase diagram), Which of the following compounds is most soluble in hexane (CH3CH2CH2CH2CH2CH2CH3)? Here's an example. A) [H+][HCO3-] / [CO2] A. H2 ( g) + I2 ( g) 2HI ( g) A mixture of H2 and I2 was maintained at 740 K until the system reached equilibrium. and A) at high temperature and high pressure Q: If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol? What is the stoichiometric coefficient of Xx(s) in the balanced reaction equation for that cell ? Albania, (+ Which metal ion in the list is most difficult to reduce? France, (+ Nepal, (+ Is there any website that covers MCQ Questions for CBSE Class 6 to 12? After a sufficiently long time, [A] will approach zero, regardless of the values of k and k'. From Midterm 3: This equilibrium is an exothermic one. 234) At equilibrium, ________. C) [H3O+][F-] / [HF][H2O] \mathrm{~Pb}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Pb}(\mathrm{s}) & \text { voltage }=-0.13 \mathrm{~V} \\ D. 1.85 Asked by sumandeesinghrana | 12 Oct, 2010, 03:00: PM Expert Answer Dear Student For the reaction H 2 + I 2 --------> 2HI In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. 33) 93) Download the Study24x7 App, so you can connect and collaborate. Two liquids, labeled A and B, form an ideal mixture with total vapor pressure P = 324.4 torr at a certain composition. A 20.0kg20.0 \mathrm{~kg}20.0kg crate sits at rest at the bottom of a 15.0m15.0 \mathrm{~m}15.0m long ramp that is inclined at 34.034.0^{\circ}34.0 above the horizontal. D. CO C. 12.54 Let's flip the above reaction. C-O 360 NO(g)+12Br2(g)NOBr(g)Kp=5.3 Identify the change that will always shift the equilibrium to the right. B) [CO2] / [H+][HCO3-] Or if any of the following reactant substances I2 (iodine), disappearing 995) The majority of the boards that prefer the NCERT Textbooks can use these Solutions for getting a grip on the subject. C. Ionic bond forces Consider the chemical equation and equilibrium constant at 25C: H2 (g)+I2 (g)2HI (g) , K=6.2102 Calculate the equilibrium constant for the following reaction at 25C: HI (g)12H2 (g)+12I2 (g) B. 27.3 kJ mol-1 In chemical equation H2(g) + I2(g) 2HI(g), the equilibrium Kp depends on. 0.183 C. 0.0010 A B + C Ukraine, (+ E) The reaction is at equilibrium when Q = Keq. By rehearsing more second Year Chemistry MCQs with Answers Pdf Download, understudies can work on their speed and precision which can help them during their board test. B) increase the equilibrium constant so that products are favored While the crate is moving, the ramp exerts a constant frictional force on it that has magnitude 65.0N65.0 \mathrm{~N}65.0N. (a)(a)(a) What is the total work done on the crate during its motion from the bottom to the top of the ramp? What is the Kw of pure water at 50.0C, if the pH is 6.630? B. 2HI (g) = H2 (g) + I2 (g) Kp = 0.016 If 2.58 atm of HI (g) is sealed in a flask, what is the partial pressure of each gas. In each table, there may be one statement that is false because it contradicts the other three statements. (Assume ideal behavior.). An aqueous solution contains 0.10M H 2S and 0.20M H Cl . 1-propanol Which change will shift the equilibrium to the left? 268) Hungary, (+ If you have any queries regarding The Solid State CBSE Class 12 Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. D) at low temperature and high pressure B) At equilibrium, the reaction quotient is undefined. Bangladesh, (+ B. increase volume Belgium, (+ Bahrain, (+ 2SO2 (g) + O2 (g) 2SO3 (g) (a) total pressure(b) catalyst used(c) amount of H2 and I2(d) temperature, (a) 2 10-4(b) 4 10-2(c) 2 10-2(d) 1 10-2, (a) bar min-1, bar2 min-1(b) bar min-1, bar1/2 min-1(c) bar1/2 min-1, bar2 min-1(d) bar min-1, bar1/2 min-1, (a) 9 times(b) 4 times(c) 16 times(d) 8 times, (a) NH4NO2 N2 + 2H2O(b) NO + O3 NO2 + O2(c) 2NO + Br2 2NOBr(d) CH3CHO CH4 + CO, (a) mol L-1 s-1(b) s-1(c) mol-2 L s-1(d)mol L-1, (a) (i)2, (ii) 1(b) (i)2,(ii) 2(c) (i) 1, (ii) 1(d) (i) 1, (ii) 2, (a) temperature of the reaction(b) extent of the reaction(c) initial concentration of the reactants(d) the time of completion of reaction, (a) Rate = k [O] [O3](b) Rate = k [O3] [O2]-1(c) Rate = k [O3](d) Rate = k [O2] [O], (a) zero order reaction(b) first order reaction(c) second order reaction(d) third order reaction, (a) order of a reaction(b) molecuiarity of a reaction(c) fast step of the mechanism of a reaction(d) half-life of the reaction, (a) the order and molecuiarity of the slowest step are equal to one(b) molecuiarity of the reaction can be zero, one or two(c) molecuiarity of the reaction can be determined only experimentally(d) more than one reacting species are involved in one step, (a) the order and molecuiarity of the slowest step are equal to one, (a) the rate of fastest intermediatestep(b) the sum total of the rates of all intermediate steps(c) the average of the rates of all the intermediate steps(d) the rate of slowest intermediate step, (d) the rate of slowest intermediate step, (a) temperature(b) mechanism of reaction as well as relative concentration of reactants(c) molecularity(d) pressure, (b) mechanism of reaction as well as relative concentration of reactants, (a) inversely proportional to the concentration units(b) independent of concentration units(c) directly proportional to concentration units(d) inversely proportional to the square of concentration units, (a) 2 10-2 s-1(b) 4 10-4 s-1(c) 20 s-1(d) 2 10-4 s-1, (a) EaR(b) Ea2.303R(c) 2.303Ea.R(d) Ea2.303, (a) mol L-1s-1(b) s-1(c) L mol-1s-1(d) L2mol-2s-1, (a) triple(b) increase by a factor of 4(c) double(d) remain unchanged. 968) Q: Calculate the molality of the solution. 2NH 3 (g) N 2 . C) 0.020 A) The equilibrium partial pressures of Br2, Cl2, and BrCl will be the same as the initial values. 100.0C New Zealand, (+ 966) (iii) The total pressure increases as the system approaches equilibrium. B. ..Keq = 6.2 x 10^2 but the same value of Kc will be obtained at a given temperature. Both TP and CP are located on the solid/liquid phase boundary. D. Nothing can be concluded about K from Ecell. Which of the following substances would you predict to have the highest Hvap? A. There is not a viable replacement for steady practice whether one needs to comprehend an idea completely or one needs to score better. Ghana, (+ You'll get a detailed solution from a subject matter expert that helps you learn core concepts. 2.35 x 104 kJ/mole C 185 Q: How long will it take for 15% of the U238 atoms in a sample of U238 to decay? Write an equilibrium constant expression b. For the reaction given in Part A, how much heat is absorbed when 2.80 mol of A reacts? From Midterm Exam 2: Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. The statements in the tables below are about two different chemical equilibria. Q8. Switzerland, (+ A. 20) . A. PO43- Example: 4.00 moles of HI are placed in an evacuated 5.00 L flask and then heated to 800 K. The system is allowed to reach What will be the equilibrium concentration of each species? If the equilibrium constants for the formation of H S from H 2S is 1.0 107 and that of S 2 from H S ions is 1.2 1013 then the concentration of S 2 ions in aqueous solution is - JEE Main 2018 9. 2 HBr(g) H2(g) + Br2(g) Kc = ? 966) Egypt, (+ If you find. 351) The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). 31) Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. with forward (A P) rate constant k and reverse (A P) rate constant k' is correct? A. These various decision inquiries for twelfth class Chemistry will help you to improve calculated and subject information abilities. 355) Kc depends on how the chemical equation is written, but not on how the reaction is carried out. D. 1, The equilibrium constant is given for two of the reactions below. So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure 25) At 400 K, the equilibrium constant for the reaction A) 100 Oman, (+ The Kc constant shows that the ratio of products to reactants is very small, indicating that a much higher concentration of reactants exists compared to the concentration of products. 46) C) N2 (g) + 2O2 (g) 2NO2 (g) Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. United Kingdom, (+ D. ion-dipole M. What is the half-life, t1/2, for this reaction in units of seconds ? Equilibrium constant expression in terms of partial pressures [The reaction X2(g)2X(g) occurs in a closed reaction vessel at constant volume and temperature. The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. Understudies who are planning for Central board assessments in Chemistry specifically CBSE, ICSE, and NIOS Board. Which statement is true at equilibrium? We hope the given CBSE MCQs for Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12th all subjects will help you. D. 1-butanol Consider the equilibrium of two (ideal) gases according to 2A A2 with equilibrium constant K = 2.010-3 at a pressure of 1 bar and 30C. Use the following data: So, visit our site and easily find MCQs for all subjects classwise. Rating: 5 / 5 stars. where n represents the stoichiometric coefficients] Part B: Calculate the work done, w. [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. Note: Names of real elements have been changed to 'Xs' and 'Xo'. Check all that apply. B) Keq does not change with temperature, whereas Q is temperature dependent. 20) E) Q is the same as Keq when a reaction is at equilibrium. By rehearsing more second Year Chemistry MCQs with Answers Pdf Download, understudies can work on their speed and exactness which can help them during their board test. Calculate the pOH of a solution that contains 7.8 x 10-6 M OH- at 25C. Reaction rates but not the rate constants k and k' depend on temperature. +1251 J mol-1 You can utilize the quick links on our page to view or download the CBSE MCQs of all classes in an easy way. Belgium, (+ Nepal, (+ [Like all equilibrium constants, the value of Kw depends on temperature. B) a decrease in the total pressure (T constant) E. increase pressure, The following reaction is exothermic. Maldives, (+ Georgia, (+ Experts are tested by Chegg as specialists in their subject area. C. 0.037 D. 6.36 torr Xd(s) | Xd2+(aq) || H+(aq) | H2(g) | Pt The amounts of H 2 and I 2 present D Temperature Medium Solution Verified by Toppr Correct option is D) The equilibrium constant does not change at all with changes in concentrations, volume, pressure, presence of catalyst, etc. Guinea, (+ 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . A. 37.5 g Key points. From Midterm Exam 2: D) [SO3]2 / [SO2]2[O2]2 A) 5.4 10-13 [When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of work] (Hint: Start with calculating the pH as if this were a monoprotic acid.) Q6. 93) France, (+ The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: View Answer Consider the following reaction: 2SO (g) + O_2 (g) to 2SO_2 (g) K_p = 36.4 at 298 K. In a reaction mixture at equilibrium, the partial pressure of SO is 0.46 atm and that of SO_2 is. 960) The rate constant for the reaction is 9.45 10-5 s-1 at 478 K. The half-life of the reaction when the initial [CH3NC] is 0.030 M is ________ s. From Midterm 3: Use the above-provided NCERT MCQ Questions for Class 12 Chemistry with Answers Pdf free download. The heat capacity of the calorimeter is 4.90 kJ/C. D) only products are present It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. A. Pakistan, (+ South Korea, (+ E. -24.5 kJ, Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. The specific heat capacity of ethanol is 2.42 J/gC. Hrxn= npHf(products) nrHf(reactants) 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) Decreased? Q: If the initial concentration of SO2Cl2 is 1.00 M, how long will it take for the concentration to decrease to 0.72 M ? H2(g) + I2(g) . is given by, 21) The equilibrium constant for the gas phase reaction All reactant and product concentrations are constant at equilibrium. What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 31 C ? 1.00 10-14 If the temperature is raised, then the forward reaction is favored. E) only reactants are present. Explain this phenomenon, keeping in mind that sound is reflected from the surface of the water and that the temperature of the air just above the water's surface is usually less than that at a height of 10m10 \mathrm{~m}10m or 20m20 \mathrm{~m}20m above the water. B) N2O4 (g) 2NO2 (g) Additionally, you can reconsider all Chemistry sections appropriately whenever and save significant season of yours during class tests and yearly tests readiness. B) The equilibrium partial pressure of BrCl (g) will be 4.00 atm. 32) D. +473 kJ Compute the pH at 25C after 3 mL of the base has been added. E. 53.1C, The specific heat capacity of liquid water is 4.18 J/g-K. How many joules of heat are needed to raise the temperature of 5.00 g of water from 25.1C to 65.3C? 977) E) only reactants are present, 22) The equilibrium constant for the gas phase reaction A. 1.14 J/(g C) 17-2 The value of Q increases as a function of time until it reaches the value of K. b) No, Q would still increase with time because the [I2] would decrease in exactly the same way as [H2] decreases. What is the vapor pressure of propane at 20.0 C? Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. D. 25.0 g granite, Cgranite = 0.79 J/gC Xs3+ + 3 e- Xs(s) : E = -0.55 V D) [H3O+][F-] / [HF] 1) Substance Hf (kJ/mol) is Keq = 3.6 10-3 at 999 K. At equilibrium, ________. 358) B) 2500 D. 40.5C Turkey, (+ A) products predominate B. A) Q does not change with temperature. What is the boiling point of water at an elevation of 1.00104 ft ? Assuming that no heat is lost to the surroundings, what will the final temperature of the system be? Poland, (+ 90) In chemical equation H2(g) + I2(g) 2HI (g), the equilibrium Kp depends on (a) total pressure (b) catalyst used (c) amount of H2 and I2 (d) temperature class-12 Please log in or register to answer this question. United Kingdom, (+ E) all of the above, 32) Consider the following reaction at equilibrium: Turkey, (+ At the same temperature, pure liquid A has a vapor pressure of 220 torr, while pure liquid B has a vapor pressure of 400 torr. (look up phase diagram). B. A. \mathrm{Zn}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Zn}(\mathrm{s}) & \text { voltage }=-0.76 \mathrm{~V} E. methanol, Give the major force between ethanol and water. B. NaCl 91) 355) Part A: Calculate the freezing point of a solution containing 12.2 g FeCl3 in 160 g water. By using Laplace transforms, solve the following differential equations C) N2 (g) + 3H2 (g) 2 NH3 (g) [The decomposition of SO2Cl2SO2Cl2 is first order in SO2Cl2SO2Cl2 and has a rate constant of 1.46104 s1s1 at a certain temperature] E. 5.01 torr. Given: N2 (g) + 3H2 (g) 2NH3 (g) 44) Find the equilibrium amounts of these compounds if they all start out at 0.120 M. Solution: Determine Qc so that you know which direction the reaction will proceed. \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Cu}(\mathrm{s}) & \text { voltage }=+0.34 \mathrm{~V} \\ A) 5.71x104 B) 0.100 C) 1.75 x10-7 D) 1.79 x10-6 E) 5.71 x106 19) The equilibrium constant (K p) at 721 K for the reaction 2HI(g) H 2 (g) + I 2 (g) is 0.0198. Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. C. surface tension C. 12.28 230) A) N2 (g) + 3H2 (g) 2NH3 (g) Q: If a reaction mixture is initially 0.20 M in X, what is the concentration of X after 151 seconds? D. Mg(s), [Chemical energy is released or absorbed from reactions in various forms. It changes only with changes in temperature of the system. 380) Close by that it helps the students with growing the overall appreciation in the subject and work on the data in the assessments. E. 48.1 J, [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. The equilibrium-constant expression depends on the _____ of the reaction. The osmotic pressures required for this process can be as high as 18.6 atm . B. 92) C. -2.97C Q: How much heat is produced by the complete reaction of 4.05 kg of nitromethane? Afghanistan, (+ AB2(g) + B(g) AB3(g) Kc = ? C. 1-pentanol - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. Note: Names of real elements have been changed to 'Xx' and 'Xa'. The equilibrium constant K p is independent of (A) Total pressure (B) Catalyst (C) The amounts of H 2 and I 2 present However, it changes with Temperature y+4y+5y=26e3t,y0=1,y0=5.y^{^{\prime \prime }}+4y^{^{\prime Determine the partial pressure of each gas at equilibrium. D -511. 1.9 10-4 M For the reaction H2(g) + I2(g) 2HI (g), the standard free energy is G^ > 0. D. C2H3O2-/HC2H3O2 at a certain temperature. Give the direction of the reaction, if K >> 1. system remains constant during its change from Examples:- (i) H2(g) + I2(g) 2HI(g) the initial to final state. 2NH3 (g) N2 (g) + 3H2 (g) E. dispersion. D. 39.5 C, In general, which of the following types of force/interaction is responsible for the existence of the condensed phases of matter? Finland, (+ The law of ________ states that energy that can be neither created or destroyed. A. New Zealand, (+ [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] Hungary, (+ Netherlands, (+ C. 2.13 10-14 is Keq = 2.80 102 at 999 K. At equilibrium, ________. D. If the temperature is raised, then the reverse reaction is favored. New Zealand, (+ United States, (+ C. HF O=O 498 is first order in CH3NC. . C. 11.70 E. -91 kJ, Identify an element that is NOT in its standard state. 2 SO2(g) + O2(g) 2 SO3(g) H2(g) +I2(g) 2HI(g) Using the Equilibrium Constant (cont) E.g.2 For the reaction: PCl5(g) PCl3(g) + Cl2(g), Kc = 0.800 M at 340oC. Comprehend the ideas and practice Objective Type Questions for twelfth Class Chemistry however much you can to score well. C. Neither direction is favored. 90) Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.] D. -150. kJ 351) From Midterm 3: B) It is a process used for the synthesis of ammonia. B. K=0 - The vapor pressure of a liquid increases with increasing temperature. D) only products are present ), [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. From the data given we can determine the starting concentrations of both H 2 and I 2 to be CH2 = nH2 V = 2.40moles 1.00L = 2.40M CI2 = nI2 V = 2.40moles 1.00L = 2.40M We can now determine the equilibrium concentrations for this reaction by using the ICE method (more here: http://en.wikipedia.org/wiki/RICE_chart) . A(g) + 2B(g) AB2(g) Kc = 59 Propane has a normal boiling point of 42.0C and a heat of vaporization (Hvap) of 19.04 kJ/mol. This problem has been solved! Hungary, (+ A 250 mL sealed flask contains 0.65 g of butane at 22C.] C. The reaction mixture will contain equal concentrations of A and B. Calculate the standard enthalpy change for the reaction B. 82) Calculate the change in pH after 15 mL of a 0.4 M solution of a strong base had been added to 100 mL of this buffer. D. The value of pH is somewhat lower than 2.13. C) 7.07 The final temperature of the mixture upon reaching thermal equilibrium is 27.9 C] +238 kJ -1282 kJ D. 5.50 10-14 B. C. remove reactant E. All of the above are conjugate acid-base pairs. D) 2HI (g) H2 (g) + I2 (g) Which of the following statements is correct for the triple point (TP) and critical point (CP) of a material. E. 73.6 kJ, It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0C to 68.0C. The heat of vaporization of the alcohol at 25 C is 45.4 kJ/mol, the specific heat of aluminum is 0.903 J/gC. The equilibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121: PCl5 (g) PCl3 (g) + Cl2 (g) . Egypt, (+ Portugal, (+ chemical equilibrium class-11 1 Answer +1 vote answered Feb 2, 2022 by Princebarnwal (34.9k points) selected Feb 6, 2022 by Jeewant Best answer For the given reaction, Kp = (pH I)2 (pH 2)(P I 2) ( p H I) 2 ( p H 2) ( P I 2) (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. C. 1.28 Part C: Calculate the change in the internal energy of the system, E. B. Switzerland, (+ C. The reciprocal concentration, [A]-1, changes linearly with time. [A solution contains a mixture of pentane and hexane at room temperature. D. - 1.23 x 103 kJ/mole. 49) 27) 10) The Keq for the equilibrium below is 7.52 10-2 at 480.0 C.
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