Exam 1 p4 - 7 Which of the following is true for a system...

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Unformatted text preview: 7. Which of the following is true for a system whose equilibrium constant is relatively small? (a) It will take a short time to reach equilibrium :b) It will take a long time to reach equilibrium K jé’fgolu {Q 00M Is) he equilibrium lies to the left (d) The equilibrium lies to the right Ti (Recd'qwf com '0 (e) Two ofthese Sim“ implies 9m“ humerq‘lor “"%(@‘r3€ denewlnu‘l-or 8. The reaction quotient for a system is 7.2 x 102. If the equilibrium constant for the system is 36, what will happen as equilibrium is approached? a) There will be a net gain in product a > K MM Hardin r (9"le LOW" ) There will be a net gain in reactant (c) There will be a net gain in both product and reactant ‘ r (d) There will be no net gain in either product or reactant AEMVMV‘QV (feadt Wt com > (e) The equilibrium constant will decrease until it equals the reaction quotient Mu ai’ inureq sc- lMus’C decrease umci 9. Consider the reaction: CaC12(s) + 2 H20 (g) e The equilibrium constant for the reaction as writte (a) K = [CaC12 - 2H20] / [CaClz] [r120]2 K = 1/ [H20]2 (c) K = 1/ (2-[H20]) fl CaC12 ' 2H20 (S) c a a. .2 ol.‘ (d) K 2 [H2012 (e) K = [CaClz ' ZHZO] / [H20]2 Tine can . x, Pfi. g j \ ~ 9" cu Pol/TS 6am: does not C‘nuge an???“ the rates of the forward and reverse reactions become equal E b0 ”:2: ‘ (“Q“St‘ (b) the concentrations of reactants and products become equal 3“ w M. u °G r Km . (c) the temperature shows a sharp rise f s (d) all chemical reactions stop L U “Ema“ (e) the forward reaction stops 10. fibrin is reached in chemical reactions when: 1 1. For a particular system at a particular temperature there equilibrium constant(s) and there equilibrium po sition(s). a) are infinite is one P ‘4 _ a. . L a 3c, @ is one are infinite °r ' ‘1'" L c is one is one . a. a mi C (d) are infinite are infinite “4““? V“ [“e‘ S 4 ' ' (e) none ofthese t.» g“ 3 :‘ve Hm. same, «ax-newer 12. (a) Write the equilibrium expression K (based on concentration), and the equilibrium expression Kp (based on partial pressure) for the following reaction. (The two are related by the ideal gas law: P = (W) RT = CRT where C is concentration. ) s k my 1% @N204(g) : @NOAg) C I 'L Bryon] 1, . 1 7- » ,_ '1“ k9: L‘— $13.81)— -_ Kc (‘2') PM o CNo (RT) ‘l d’ 1 ‘t ~ on Two $lde$ (b) For what type of reaction doest equal K? when Sum CF “49“” 5 are “(We 9: Hat (m “‘"‘= (RNA ...
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