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

[The vapor above an aqueous solution contains 17.9 mg water per liter at 25 C] Hydrogen and iodine react to form hydrogen iodide, like this: H_2 (g) + I_2 (g) rightarrow 2 HI (g) Also, a chemist finds that at a certain temperature the equilibrium mixture of hydrogen, iodine, and hydrogen iodide has the following composition: Calculate the value of the equilibrium constant K_p for this reaction. 2 NO(g) + O2(g) ' 2 NO2(g) Maldives, (+ . 2. Consider the reaction: H2 (g) + 12 (9) ~ 2 HI (g) Kp = 92.6 Zimbabwe, (+ United Arab Emirates, (+ 2COF2(g)CO2(g)+CF4(g), Kc=6.30 Q: What is the [H3O+] in pure water at body temperature? 0.81 C) addition of some to the reaction vessel (V and T constant) Q: What is the percent ionization of ammonia at this concentration? This equilibrium is an exothermic one. CBSE Class 10 Answered - TopperLearning B. NaCl M. What is the half-life, t1/2, for this reaction in units of seconds ? E. In equilibrium, the ratio [P] / [A] is equal to k / k'. Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25 C. Sweden, (+ Q: What is the pH of a 0.240 M ammonia solution? E) none of the above, 12) The Keq for the equilibrium below is 50. All reactant and product concentrations are constant at equilibrium. Essentt - Handpicked Products. Beside the PDF archive of Chemistry we are giving the electronic test which will help in everyday act of the Mathematical Problems. Bangladesh, (+ You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Explain why chlorine occurs as diatomic molecules in nature rather than individual atoms. E. The value of pH is 2.13. Determine the value of the missing equilibrium constant. In chemical equation H2 (g) + I2 (g) 2HI (g) the equilibrium constant Kp depends on See more A total pressure B catalyst used C amount of H2 and I2 D Temperature Submit Class 12 (PCB) Class 12 (PCM) Like Comment Share Write a comment 500+ more Questions to answer Popular Courses FREE How to start preparing for IIT from Class 10th The system is losing 115 J, while the surroundings are gaining 115 J, A. energy associated with the temperature of an object, D. energy associated with the motion of an object, D. energy associated with the position or composition of an object. H2 (g) + I2 (g) 2HI (g) 90) 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. 2CO2 (g) 2CO (g) + O2 (g) H = -514 kJ E. All of these have intermolecular forces stronger than dispersion. D. 1.85 India, (+ Calculate the standard enthalpy change for the reaction Part B: If the butane is warmed to 25 C, how much liquid butane is present? A) The equilibrium partial pressures of Br2, Cl2, and BrCl will be the same as the initial values. A. O2 E. 2.11, From Midterm Exam 2: A. ethanol D. +473 kJ 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. 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 ? at a certain temperature. 07 H2(g) Nonmetal Gas 2 00 L container and goes to equilibrium at 200 oC 00 L container and goes to equilibrium at 200 oC. . E. 13.02, From Midterm Exam 2: . y+4y+5y=26e3t,y0=1,y0=5. South Korea, (+ A) some removal of from the reaction vessel (V and T constant) +238 kJ [Ammonia, NH3, is a weak base with a Kb value of 1.8105.] Poland, (+ If the value for K = 2.1 X10-2 at 730 K, which substance predominates, HI or H2 and I2 We hope the given NCERT MCQ Questions for Class 12 Chemistry PDF Free Download will definitely yield fruitful results. A. Saudi Arabia, (+ -25.5 kJ What is the Kw of pure water at 50.0C, if the pH is 6.630? B. For the equilibrium of the dissociation reaction of the compound 'A2', the concentrations were found to be [A2] = 0.022 M and [A] = 0.13 M at 25C: Business, Finance, Economics, Accounting, Operations Management, Computer Science, Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical . After a sufficiently long time, [A] will approach zero, regardless of the values of k and k'. Determine the cell notation for the redox reaction given below. E. none of the above. 855) [Consider these two acids and their Ka values: - The vapor pressure of a liquid increases with increasing temperature. Switzerland, (+ Hrxn= npHf(products) nrHf(reactants) 9) The equilibrium expression for Kp for the reaction below is ________. 355) 855) D. The value of pH is somewhat lower than 2.13. D. 4.60. By using Laplace transforms, solve the following differential equations D) 2HI (g) H2 (g) + I2 (g) From Midterm 3: For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction PPT PowerPoint Presentation 233) 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? 15.5: Calculating Equilibrium Constants - Chemistry LibreTexts H2(g)+I2(g)2HI(g) Which of the following statement is/are true? [An aqueous solution contains 32% HCl by mass] India, (+ For both acid and base, 'strong' means fully dissociated. 7) E. -91 kJ, Identify an element that is NOT in its standard state. Bahrain, (+ C. 1.92 x 103 kJ/mole The P-M AS-NM R chemical shift changes from -15.6 ppm ( 6 -hydrate) to - 1 1.0 ppm (anhydrous). (look up carbon dioxide phase diagram), Which of the following compounds is most soluble in hexane (CH3CH2CH2CH2CH2CH2CH3)? 2) Which one of the following is true concerning the Haber process? Calculate K and Kp for this reaction. 348) Germany, (+ In chemical equation H2(g) + I2(g)2HI (g) the equilibrium constant Kpdepends onSee more. 3.48 J/(g C) United States, (+ C. Ionic bond forces E. The reverse reaction is favored. H2 (g) + I2 (g) 2HI (g) 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] 230) b. 46) These numerous decision inquiries for Chemistry Class 12 will assist with further developing logical and complex issue unraveling abilities. A(g) + 2B(g) AB2(g) Kc = 59 2 Xs(s) + 3 Xn2+(aq) 2 Xs3+(aq) + 3 Xn(s) . Science Chemistry For the following reaction, 2HI(g) --> H2(g) + I2(g) a. Egypt, (+ Poland, (+ A second-order reaction of the type 2A P was carried out in a solution with the initial concentration of A being [A]0 = 1.5 mol L-1. Relationships between chemical equations and the expressions of equilibrium constants The expression of equilibrium constant depends on how the equilibrium equation is written. Bangladesh, (+ Georgia, (+ D) 1.90 1019 92) is Keq = 4.34 10-3 at 300 C. Which of the following is NOT a conjugate acid-base pair? France, (+ 27) How is the reaction quotient used to determine whether a system is 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. Mexico, (+ 48.6 C A. Covalent bond forces 992) 2NH3 (g) N2 (g) + 3H2 (g) D) The reaction is at equilibrium when Q > Keq. B. For a chemical equilibrium reaction H2 (g) + I2 (g) 2HI(g) write an expression for Kp (and relate it to Kc). ..Keq = 6.2 x 10^2 Nepal, (+ 33) Oman, (+ D. At any time, the ratio [P] / [A] is equal to k' / k. The vapor pressure of a certain sample has been measured at two different temperatures and the results are P1 = 160 kPa at T1 = 240 K and P2 = 840 kPa at T2 = 270 K. Determine the molar vaporization enthalpy, Hvap, from these results. D. If the temperature is raised, then the reverse reaction is favored. E) none of the above, 15) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 90) 1.14 J/(g C) Check all that apply. A. 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. Which statement applies to the equilibrium of this reaction after the pressure is changed to 2 bar, but with the temperature remaining at 30C ? A. 4CuO (s) + CH4 (g) CO2 (g) + 4Cu (s) + 2H2O (g), 20) The equilibrium-constant expression for the reaction C. 62.5C ASU CHM 118 FINAL EXAM Flashcards | Quizlet (look up phase diagram). D. SiF4 Mexico, (+ D. -0.91C South Africa, (+ Rating: 5 / 5 stars. 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 ? E) shift the equilibrium to the right, D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture, Chemistry: Chapter 13 Review: Properties of S, CHAPTER 17: ADDITIONAL ASPECTS OF AQUEOUS EQU. H2(g)+I2(g)2HI(g) , K=6.2102 Calculate the equilibrium constant 32) Another example of a chemical equation that can be used to explain is given below: Equation: 2 S O 2 ( g) + O 2 ( g) 2 S O 3 ( g) Equilibrium Constant: K C = [ S O 3] 2 [ S O 2] 2 [ O 2] Moreover, in terms of finding equilibrium constant for gases, partial pressure is taken into account. Q: What is the half-life for this reaction? When a reaction component is a gas, we can also express the amount of that chemical at equilibrium in terms of its partial pressure. Cambodia, (+ In each table, there may be one statement that is false because it contradicts the other three statements. Which one? Equilibrium constant Kp is equal to the partial pressure of products divided by partial pressure of reactants and the partial pressure are raised with some power which is equal to the coefficient of the substance in balanced equation. 11) The Keq for the equilibrium below is 5.4 1013 at 480.0 C. D) a decrease in the total volume of the reaction vessel (T constant) B. Maldives, (+ How is vapor pressure related to temperature? ICEchart - Purdue University D) 2 SO3 (g) 2 SO2 (g) + O2 (g) After equilibrium was reached, the partial pressure of NO dropped to 320 torr. 234) 64) What is the boiling point of water at an elevation of 1.00104 ft ? (Assume ideal behavior.). A. It can be represented as. What is the kc and kp of 2HI (g) H2 (g) + I2 (g)? - Quora [The total change in internal energy is the sum of the heat, q, and work, w: E=q+w] the sign of E for the system: negative (-) = The system expands and the surroundings get hotter positive (+) = The system contracts and the surroundings get colder Which of the following is TRUE if E sys = - 115 J? [A solution contains a mixture of pentane and hexane at room temperature. 4) Which of the following expressions is the correct equilibrium-constant expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide? 0.043 SiO2(s) + 4 HF(g) SiF4(g) + 2 H2O(l) Hrxn = -184 kJ Spain, (+ 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. \mathrm{Ag}^{+}(\mathrm{aq})+\mathrm{e}^{-} \rightleftharpoons \mathrm{Ag}(\mathrm{s}) & \text { voltage }=+0.80 \mathrm{~V} \\ What is the specific heat of benzene? Equilibrium Constant Kp Definition And Examples - Chemistry Dictionary 10 C. 5.25 J/(g C) What is the value of Keq for the following reaction? A) increase the rate of the forward reaction only It changes only with changes in temperature of the system. E) -50, 14) Given the following reaction at equilibrium, if Kc = 1.90 1019 at 25.0 C, Kp = ________. B. This quantity of heat is equivalent to: information you need to know about E for the system, [The total change in internal energy is the sum of the heat, q, and work, w: E=q+w]. If you find. Careful quan titative dehydration experiments [17] show that at 173 K each protonated form o f the anion has a distinct resonance, see Figure 8 . HC2H3O2 1.8105] Equilibrium Constant Kp: Expression, Equation | StudySmarter \mathrm{Zn}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightleftharpoons \mathrm{Zn}(\mathrm{s}) & \text { voltage }=-0.76 \mathrm{~V} D. capillary action A) products predominate PDF 5.9 10 -3 - gccaz.edu Which statement describes best the pH of a 0.010 M solution of this acid. 48) Understudies who wish to hone their insight into Chemistry. Q: How long will it take for 15% of the U238 atoms in a sample of U238 to decay? C) decrease the value of the equilibrium constant 32) 351) Close by that it helps the students with growing the overall appreciation in the subject and work on the data in the assessments. Understudies who are getting ready for Online/Offline Tests/Contests in Chemistry for class 12. Note: Names of real elements have been changed to 'Xs' and 'Xo'. What happens to the vapor pressure of a substance when the temperature is increased? D. 5.11 Egypt, (+ but the same value of Kc will be obtained at a given temperature. D. 40.5C 26) Which of the following statements is true? -1282 kJ C. raising the temperature 380) 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. [Calculate the freezing point and boiling point in each solution, assuming complete dissociation of the solute] This multitude of MCQs with answers are delivered by subject specialists for a wide range of understudies. Q: What is the mole fraction of hexane? B) at high temperature and low pressure 1.00 10-14 Hydrogen bonding is a strong intermolecular force that makes this substance a liquid at room temperature), Identify the term used to describe the ability of a liquid to flow against gravity up a narrow tube. C) [H3O+][F-] / [HF][H2O] 2 NO (g) N2 (g) + O2 (g). C. The bonds that break and those that form are of approximately the same strength. These various decision inquiries for twelfth class Chemistry will help you to improve calculated and subject information abilities. H2(g)+I2(g)2HI(g) , K=6.2102 Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. Guinea, (+ A P A) Q does not change with temperature. D) [NH3]2[H2Se] 28) Which reaction will shift to the left in response to a decrease in volume? For the reaction H 2( g )+ I 2( g ) longrightarrow 2 HI ( g ), the 33) The symbols have their usual meaning, for example AG stands for the standard Gibbs free energy of reaction and K stands for the equilibrium constant. 93) E. Xe. 10) The Keq for the equilibrium below is 7.52 10-2 at 480.0 C. 93) A. After 203 s the concentration of A had fallen to one fifth of the initial value. - A gas can be converted into a liquid by increasing the pressure of a gas sample. B. A. adding SO3 B) reactants predominate Part C: Calculate the change in the internal energy of the system, E. What is the primary source of water stored in an aquifer? (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. E) only reactants are present, 24) The equilibrium constant for the gas phase reaction D. ion-dipole 2 HBr(g) H2(g) + Br2(g) Kc = ? 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) The isomerization of methylisonitrile to acetonitrile 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] A. Zimbabwe, (+ See Answer. What is the stoichiometric coefficient of Xx(s) in the balanced reaction equation for that cell ? 3. D. 5.50 10-14 B) [SO2] / [SO3] Write the overall balanced equation for the reaction. Tajikistan, (+ 2NO (g) + O2 (g) 2NO2 (g) Energy can be transferred in many ways, one of which is in the form of work. Mauritius, (+ - A gas can be converted into a liquid by cooling. A) [H+][HCO3-] / [CO2] 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) C. The reaction mixture will contain equal concentrations of A and B. N2(g) + O2(g) 2 NO(g) Hrxn = +183 kJ 1 Answer +1 vote answered Dec 12, 2019 by Kajal01 (25.8k points) Answer (c) amount of H2 and I2 Prev Question Next Question Reaction rates but not the rate constants k and k' depend on temperature. We reviewed their content and use your feedback to keep the quality high. Suppose 0.811 mol of HI is placed in a 1.50-L container at 500 K. What is the equilibrium concentration of H2 (g)? (Assume that the cylinder and lightbulb assembly comprise the system and assume two significant figures. Here's an example. A. All the Solutions are explained in a comprehensive manner and are recommended by many subject experts. Half-reaction reaction potentials you might need are: 977) B. What Is The Equilibrium Expression For H2 I2 2Hi? Quick Answer 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. Consider the chemical equation and equilibrium constant at 25C: 9.64 From Midterm Exam 2: Q8. A. Consider a cell that is built using the following two half-reactions, 971) B. Guinea, (+ 92) Isotonic saline solution, which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 g of NaCl in enough water to produce 100. mL of solution. 5) Which of the following expressions is the correct equilibrium-constant expression for the following reaction? 8) The equilibrium expression for Kp for the reaction below is ________. Give the direction of the reaction, if K >> 1. Which of the following statements is TRUE? 263) Determine the value of the missing equilibrium constant. d. Which metal ion in the list is the easiest to reduce? Belgium, (+ He(g) Part A: Use the wattage of the lightbulb and the time it is on to calculate the heat transferred, q, in joules. cors.archive.org C. Dynamic equilibrium in a chemical reaction is the condition in which the rate of the forward reaction equals the rate of the reverse reaction. South Africa, (+ Consider the chemical equation and equilibrium constant at 25C: 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) . In this case, you just need to observe to see if product substance HI (hydroiodic acid), appearing at the end of the reaction. Portugal, (+ a. 91) D. 456 kJ Here you will find NCERT MCQ Questions for Class 12 Chemistry with Answers PDF Free Download based on the important concepts and topics given in the textbook.This may assist you to understand and check your knowledge about the chapters. Use Q to determine which of the statements below is true. A) The reaction quotient must be satisfied for equilibrium to be achieved. Afghanistan, (+ The forward reaction is favored. NCERT CBSE KVS Class 12 Chemistry MCQs will assist the children with reinforcing ideas and further develop marks in tests and tests. By clicking Agree & join, you agree to the Study24x7 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. Hydrogen iodide can decompose into hydrogen and iodine gases. 2HI (g (Pg.5) (c) Isobaric process:- An isobaric process is In a homogeneous equilibrium, all the defined as one in which the pressure of the reactants and products are in the same phase. Understudies who are getting ready for designing and clinical selection tests like NEET, IIT JEE, AIIMS, JIPMER and SAT Exams in Chemistry. 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. A B + C 233) [A silver block, initially at 58.8 C, is submerged into 100.0 g of water at 25.0 C, in an insulated container. A. increase product B) N2 (g) + O2 (g) 2NO (g) H2 (g) + I2 (g) <------------------> 2 HI (g) 44) C-H 414 Chemical Kinetics Questions and Answers | Homework.Study.com C) roughly equal amounts of products and reactants are present Cd(s) + 2 Ag+(aq) Cd2+(aq) + 2 Ag(s), Calculate E cell Sweden, (+ is given by, 21) The equilibrium constant for the gas phase reaction A 250 mL sealed flask contains 0.65 g of butane at 22C.] From Midterm 3: D. 6.36 torr E. 1.62. C. State functions do not depend on the path taken to arrive at a particular state. Solved Hydrogen iodide undergoes decomposition according to - Chegg