Question 19 of 25 Available From: Not Se Due Date Points Possible: 100 Grade Cat

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Question 19 of 25 Available From: Not Se Due Date Points Possible: 100 Grade Category: Graded Description: Policies: General Chemistry 4th Editiop University Science Books Map 10/23/ The following equation represents the decomposition of a generic diatomic element in its standard state. Home Assume that the standard molar Gibbs energy of formation of X(g) is 5.18 kJ mol at 2000. K and -64.90 kJ mol- at 3000. K. Determine the value of K (the thermodynamic equilibrium constant) at each temperature You can check your answe You can view solutions wh up on any question. You can keep trying to ans you get it right or give up You lose 5% of the points a in your question for each i answer At 2000. K, we were given: G_ 5.18 kJ-mol-1. What is K at that temperature? Number K at 2000. K At 3000. K, we were given: G-_ 64.90 kJ-mol-1 what is Kat that temperature? eTextbook O Help With This Topic K at 3000, K- D Web Help & Videos O Technical Support and Bu Y Hint O Previous Give Up & View Solution O Check Answer Next -I Exit

Explanation / Answer

1) At 2000 K

T = 2000 K
G = 5.18 KJ/mol
G = 5180 J/mol

use:
G = -R*T*ln Kc
5180 = - 8.314*2000.0* ln(Kc)
ln Kc = -0.3115
Kc = 0.732

Answer: 0.732

2) At 3000 K

T = 3000 K
G = -64.9 KJ/mol
G = -64900 J/mol

use:
G = -R*T*ln Kc
-64900 = - 8.314*3000.0* ln(Kc)
ln Kc = 2.602
Kc = 13.5

Answer: 13.5

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