in chemical equation h2+i2=2hi the equilibrium constant kp depends on

E. 29.8 kJ mol-1, What is the conjugate base of H2PO4- ? 8) The equilibrium expression for Kp for the reaction below is ________. D. If the temperature is raised, then the reverse reaction is favored. [An aqueous solution contains 32% HCl by mass] What is the standard free energy change (Grxn) for this reaction? Q: Find the value of the [H3O+] of rain over the West Coast that has a pH of 5.5. 45) What is the osmotic pressure of this solution at 25 C? (NH4)2Se (s) 2NH3 (g) + H2Se (g) B.54.4 J The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: D. C2H3O2-/HC2H3O2 Cd(s) + 2 Ag+(aq) Cd2+(aq) + 2 Ag(s), Calculate E cell HF (aq) + H2O (l) H3O+ (aq) + F- (aq) Students also can take a free test of the Multiple Choice Questions of Class 12 Chemistry. Netherlands, (+ 90) Bond Bond Energy (kJ/mol) 855) 224) What is the osmotic pressure of a solution made by dissolving 45.0 g of glucose, C6H12O6, in enough water to form 225.0 mL of solution at 36.0 C ? If the value for K = 2.1 X10-2 at 730 K, which substance predominates, HI or H2 and I2 Mexico, (+ Turkey, (+ 41) Asked by sumandeesinghrana | 12 Oct, 2010, 03:00: PM Expert Answer Dear Student For the reaction H 2 + I 2 --------> 2HI Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on Skype (Opens in new window), Click to share on WhatsApp (Opens in new window), General Principles and Processes of Isolation of Elements Class 12 MCQ Questions, The p-Block Elements Class 12 MCQ Questions, The d-and f-Block Elements Class 12 MCQ Questions, Coordination Compounds Class 12 MCQ Questions, Haloalkanes and Haloarenes Class 12 MCQ Questions, MCQ Questions for Class 12 Chemistry Chapter 1 The Solid State with Answers, MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers, MCQ Questions for Class 12 Chemistry Chapter 3 Electrochemistry with Answers, MCQ Questions for Class 12 Chemistry Chapter 5 Surface Chemistry with Answers, MCQ Questions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements with Answers, MCQ Questions for Class 12 Chemistry Chapter 7 The p-Block Elements with Answers, MCQ Questions for Class 12 Chemistry Chapter 8 The d-and f-Block Elements with Answers, MCQ Questions for Class 12 Chemistry Chapter 9 Coordination Compounds with Answers, MCQ Questions for Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes with Answers, Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download. 32) 358) After equilibrium was reached, the partial pressure of NO dropped to 320 torr. 2 SO2(g) + O2(g) 2 SO3(g) 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) What is the primary source of water stored in an aquifer? C) roughly equal amounts of products and reactants are present B. CP is always at a higher temperature relative to TP. ), [A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. Calculate K and Kp for this reaction. Each question has four options followed by the right answer. 2HI(g); Equilibrium is the exact balancing of two opposing processes. The equilibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121: PCl5 (g) PCl3 (g) + Cl2 (g) . Sweden, (+ 960) See some more details on the topic What is the equilibrium expression for H2 I2 2HI? 348) 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. 973) The NCERT Solutions for the questions are present on our site or you can find them online too. The value of pH is somewhat higher than 2.13. PART A: A. BF3 D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture B) H2 (g) + Cl2 (g) 2 HCl (g) a. B. The gases react to form l-l] according to the equation above. 34) Finland, (+ It is the best methodology to chip away at the finished result. Bangladesh, (+ C) N2 (g) + 3H2 (g) 2 NH3 (g) Sweden, (+ 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. CBSE Textbooks can be great to guide you for any exam and has detailed solutions for the questions. here: 2HI the concentration at equilibrium is H2=I2=HI=4mol/dm Q: Find the volume of methane measured at 298 K and 1.72 atm required to convert 0.620 L of water at 298 K to water vapor at 373 K. The enthalpy change for converting 1.00 mol of ice at -50.0C to water at 70.0C is __________ kJ. HNO2 4.6104 Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. 1 Answer +1 vote answered Dec 12, 2019 by Kajal01 (25.8k points) Answer (c) amount of H2 and I2 Prev Question Next Question A. 233) [The vapor above an aqueous solution contains 17.9 mg water per liter at 25 C] A. The equilibrium constant (K ) would be __________. The reaction mixture will contain [A]=0.1M and [B]=1.0M. [Suppose that 1.10 g of rubbing alcohol (C3H8O)] A. 2003-2023 Chegg Inc. All rights reserved. Donald A. McQuarrie, Ethan B Gallogly, Peter A Rock, Edward Atkins, Julio de Paula, Peter Atkins. E. 9.40, A mixture containing 20.6 g of ice (at exactly 0.00 C) and 70.3 g of water (at 62.9 C) is placed in an insulated container. but the same value of Kc will be obtained at a given temperature. C) N2 (g) + 2O2 (g) 2NO2 (g) -333 kJ 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? If you have any query regarding CBSE MCQs, drop a comment below and we will get back to you at the earliest. C. 1-pentanol 2 HD(g) H2(g) + D2(g) Kc = 0.28 Q: What is the mass of the silver block? France, (+ This equilibrium is an exothermic one. 6) The equilibrium-constant expression depends on the ________ of the reaction. [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. New Zealand, (+ C) roughly equal amounts of products and reactants are present 17.9 A homogeneous equilibrium reaction exists when all the components of the reaction are in the same phase (i.e., gas, liquid, solid, aqueous). Q: What is the half-life for this reaction? 45) Key points. 2 HBr(g) H2(g) + Br2(g) Kc = ? D. CH3OH, D. CH3OH Utilizing the assets accessible you can score well in the test. What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with K a = 3.5 10-8? 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: B. It is a common experience that on a calm, sunny day one can hear voices of persons in a boat over great distances. Xx+(aq) + e-(aq) Xx(s) , 2NO (g) + O2 (g) 2NO2 (g) 6.41 B. Dynamic equilibrium in a chemical reaction is the condition in which the rate of the forward reaction is lower than the rate of the reverse reaction. What is the specific heat of benzene? You can likewise reconsider all Chemistry sections appropriately and save time during your group tests and tests. }}+5y=26e^{3t},~~~~~y_{0}=1,~y_{0}^{^{\prime }}=5. D. increase reactant South Africa, (+ The specific heats of ice, water, and steam are 2.09 J/gK, 4.18 J/gK, and 1.84 J/gK, respectively. 27) C. 12.28 10) The Keq for the equilibrium below is 7.52 10-2 at 480.0 C. United Arab Emirates, (+ Moreover, access the Chapter Wise MCQs of Class 12 Chemistry and set up the points and subtopics in it. Bahrain, (+ Q > K p so too many products are present & reaction shifts left to attain eq Rxn shifts , thus products decrease (- signs) and reactants increase (+ signs) . What state transition or transistions occur in carbon dioxide if you begin with a sample of carbon dioxide at 60.0 C at 50.0 atm and warm the sample to 10.0 C and 50.0 atm? B) [CO2] / [H+][HCO3-] Denmark, (+ 9) The equilibrium expression for Kp for the reaction below is ________. B. C6H6 In a particular experiment, the partial pressures of H 2 and I 2 - A liquid can be converted to a gas by cooling. Which of the following substances would you predict to have the highest Hvap? O=O 498 Strong bonds break and weak bonds form. South Africa, (+ C. 1.94 - 1.92 x 103 kJ/mole The amount of 2.62 mol of a sugar is added to 1.64 kg of pure water at standard pressure. Saudi Arabia, (+ 91) Determine the value of the missing equilibrium constant. Which metal in the list is the best reducing agent? Understudies who are planning for serious assessments like NTSE, Olympiad, and so forth for class 12. Pakistan, (+ See Answer. A) 2HI (g) H2 (g) + I2 (g) 268) C. The reciprocal concentration, [A]-1, changes linearly with time. A 250 mL sealed flask contains 0.65 g of butane at 22C.] 3. Substance Hf (kJ/mol) 880) 7) The lightbulb is turned on for 0.015 h, and the assembly expands from an initial volume of 0.90 L to a final volume of 5.89 L against an external pressure of 1.0 atm] Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. E. Xe. 7) 31) Mauritius, (+ NCERT Exemplars are basically practice-books that contain additional questions of higher level and give you comprehensive and thorough learning. New Zealand, (+ The most easily measurable form of energy comes in the form of heat, or enthalpy. What happens to the vapor pressure of a substance when the temperature is increased? 27.3 kJ mol-1 HC2H3O2 1.8105] B) [(NH4)2Se] / [NH3]2[H2Se] 32) 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. E) [H+][HCO3-], 18) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? Mauritius, (+ CH4(g)+Cl2(g)CH3Cl(g)+HCl(g), H=99.60 kJ H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant 880) Thus, by adding a small amount of I2, neither side would be favored since the constant shows that little I2 would be produced. A. 82) Xd(s) | Xd2+(aq) || H+(aq) | H2(g) | Pt D.2.08 10-2 J Determine the value of . 234) When a liquid evaporates in a closed container, molecules with relatively higher kinetic energy escape the liquid surface into the vapour phase and number of liquid molecules from the vapour phase strike the liquid surface and are retained in the liquid phase. B. D. 0.420 A closed vessel at 400 K is charged with 1.00 atm of Br2 (g), 1.00 atm of Cl2 (g), and 2.00 atm of BrCl (g). 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. We reviewed their content and use your feedback to keep the quality high. 44) D. 25.0 g granite, Cgranite = 0.79 J/gC D) N2 (g) + 3H2 (g) 2NH3 (g) 25) At 400 K, the equilibrium constant for the reaction New Zealand, (+ Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature.] NO(g)+12Br2(g)NOBr(g)Kp=5.3 Germany, (+ In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. 234) B. B. [Acid rain over the Great Lakes has a pH of about 4.6.] The total volume will change to half of the initial value at 1 bar. C. H3O+/OH- 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) . Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force. A. K<1 992) B) reactants predominate Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. D) [NH3]2[H2Se] C. The value of K remains, but the equilibrium is shifted towards more reactants. What is dynamic equilibrium? B. Hrxn can be determined using constant pressure calorimetry. B. For the comforts of the understudies we have furnished the part savvy Chemistry MCQs with replies here. 25.0 g Ag, CAg = 0.235 J/gC 971) D. 456 kJ 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. all of the above Consider the following reactions and their respective equilibrium constants: 92) Assuming that no heat is lost to the surroundings, what will the final temperature of the system be? D. +473 kJ D. - 1.23 x 103 kJ/mole. 45) 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) O2(g)+2H2O(l)+4Ag(s) 4OH(aq)+4Ag+(aq). Note: Names of real elements have been changed to 'Xs' and 'Xo'. Let us consider that one mole of H2 and one mole of I2 are present initially in a vessel of volume V dm3. B. removing O2 31) Nigeria, (+ India, (+ 3.48 J/(g C) Swaziland, (+ [Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 C. B. - The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. [The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.46104 s1 at a certain temperature] 93) So Kp = (PH2) x (PI2) / PHI^2 P = partial pressure C. 12.54 Hungary, (+ Experts are tested by Chegg as specialists in their subject area. The lightbulb is turned on for 0.015 h, and the assembly expands from an initial volume of 0.90 L to a final volume of 5.89 L against an external pressure of 1.0 atm] B) reactants predominate Use the following data: D. H3PO4 33) H2 (g) + I2 (g)-- > < -- 2HI(g) H=-10.4 kJ. Q: How long will it take for the concentration of SO2Cl2 to decrease to 25% of its initial concentration? C. K>1 Pakistan, (+ At equilibrium, ________. Give the direction of the reaction, if K >> 1. Cambodia, (+ What is the need of NCERT Solutions and CBSE MCQs? H2(g) + I2(g) .