For the gas phase reaction 2NO(g) N2(g) + O2(g), DH = - 43.... | CHEMISTRY - RELATIONSHIP BETWEEN EQUILIBRIUM CONSTANT (K), REACTIONS QUOTIENT (Q) AND GIBBS ENERGY (G) | SolveeIt | Solveeit

Today, August 18

Question

For the gas phase reaction 2NO(g) N2(g) + O2(g),

DH = - 43.5 kcal, which one of the following is true for N2(g) + O2 (g) 2NO(g)

A

K is independent of T

B

K decreases as T decreases

C

K increases as T decreases

D

K varies with addition of NO

Answer

K decreases as T decreases

Explanation

Solution

The given reaction is endothermic. Therefore, according to Le-Chaltlier’s Principle, high temperature favors forward reaction and hence K increase as T increase or K decrease as T decreases.