At 800 K, the equilibrium constant for the reactionA2(g)⇌ 2 A(g) is Kc = 3.1 x 10-4. (a) Assuming bothforward and reverse reactions are elementary reactions,which rate constant do you expect to be larger, kf or kr?(b) If the value of kf = 0.27 s-1, what is the value of krat 800 K? (c) Based on the nature of the reaction, do youexpect the forward reaction to be endothermic or exothermic?(d) If the temperature is raised to 1000 K, willthe reverse rate constant kr increase or decrease? Will thechange in kr be larger or smaller than the change in kf ?
At 800 K, the equilibrium constant for the reactionA2(g)⇌ 2 A(g) is Kc = 3.1 x 10-4. (a) Assuming bothforward and reverse reactions are elementary reactions,which rate constant do you expect to be larger, kf or kr?(b) If the value of kf = 0.27 s-1, what is the value of krat 800 K? (c) Based on the nature of the reaction, do youexpect the forward reaction to be endothermic or exothermic?(d) If the temperature is raised to 1000 K, willthe reverse rate constant kr increase or decrease? Will thechange in kr be larger or smaller than the change in kf ?
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter12: Chemical Equilibrium
Section12.5: Using Equilibrium Constants
Problem 12.7CE
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At 800 K, the equilibrium constant for the reaction
A2(g)⇌ 2 A(g) is Kc = 3.1 x 10-4. (a) Assuming both
forward and reverse reactions are elementary reactions,
which rate constant do you expect to be larger, kf or kr?
(b) If the value of kf = 0.27 s-1, what is the value of kr
at 800 K? (c) Based on the nature of the reaction, do you
expect the forward reaction to be endothermic or exothermic?
(d) If the temperature is raised to 1000 K, will
the reverse rate constant kr increase or decrease? Will the
change in kr be larger or smaller than the change in kf ?
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