Name: Sec: mistry Exam: On E:quilibrium Concepts Multiple-choice Questions (50%

Question

Name: Sec: mistry Exam: On E:quilibrium Concepts Multiple-choice Questions (50% of Exam) 1.) What is the expression that best describes Ke for this NF, + HCl@NH4C1 (s) on? [NH3)] [HC) INH3][HC] ° =-10 kJ, which statement is true for this reaction? 2) Consider a reaction for which G , which a.) The equilibrium coefficient Ke will decrease when T is increaced crease when T is increased The equilibrium coefficient Ke will in c) The equilibrium coefficient Ke will not change when Tis i d.) The equilibrium coefficient Ke may or may not change when T is increased because the value of R is not known. 3.) The below salt dissolves in water, according to this mechanism: BaF2 (s)Ba()+2F (a) What effect would the addition of concentrated Ba(NOsh have on this equilibrium? a.) Q becomes larger & the reaction shifts right. b.) Q becomes larger & the reaction shifts left O3)h have on this equilibrium? Q becomes smaller & the reaction shifts right. d.) Q becomes smaller & the reaction shifts left. 4.) Based upon the following information, which one is true about the reaction mixture? where P (SO2) -2.00 atm, P (02) 0.50 atm and P (SO;) 0.40 atm a.) Produ uct concentration is too high. Reaction will shift right to establish equilibrium on is too high. Reaction will shift left to establish equilibrium. c.) Reactant d.) Reactant concentrati concentration is too high. Reaction will shift right to establish equilibrium. on is too high. Reaction will shift left to establish equilibrium. S: 2

Explanation / Answer

Answer 1. c

Because of simple law of chemical equilibrium.

Because at equilibrium rate of forward reaction = rate of backward reaction.

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