Question

In which of the following equilibrium $ {{K}_{c}} $ and $ {{K}_{p}} $ are not equal?

• A. $ 2C(s)+{{O}_{2}} (g) \rightleftharpoons 2C{{O}_{2}}(g) $
• B. $ 2NO(g){{N}_{2}}(g) \rightleftharpoons +{{O}_{2}}(g) $
• C. $ S{{O}_{2}}(g)+N{{O}_{2}}(g) \rightleftharpoons S{{O}_{3}}(g)+NO(g) $
• D. $ {{H}_{2}}(g)+{{l}_{2}}(g) \rightleftharpoons 2Hl(g) $

Answer 1

Answer: (A)

$ {{K}_{p}}={{K}_{c}}{{(RT)}^{\Delta {{n}_{g}}}} $
$ \Delta {{n}_{g}}\ne 0 $
for the reaction
$ 2C(s)+{{O}_{2}}(g)2C{{O}_{2}} $
Thus, $ {{K}_{p}}\ne {{K}_{c}} $