Question

Match the List I (Equations) with the List II (Type of Processes).

List I (Equations)	List II (Type of processes)
(a) $K_p>Q$	(i) Non-spontaneous
(b) $\Delta G^o<RT{\log }_{e}Q$	(ii) Equilibrium
(c) $K_p=Q$	(iii) Spontaneous and endothermic
(d)$T>\frac{\Delta H}{\Delta S}$	(iv) Spontaneous

Select the correct matching code.

• A. $a\to i;b\to ii;c\to iii;d\to iv$
• B. $a\to iv;b\to iii;c\to ii;d\to i$
• C. $a\to iv;b\to i;c\to ii;d\to iv$
• D. $a\to ii;b\to i;c\to iii;d\to iv$

Answer 1

Answer: (C)

$a\to iv;b\to i;c\to ii;d\to iv$

• When $K_p>Q$, the reaction goes in the forward direction i.e. the reaction is spontaneous.
• Given $\Delta G^0<RTlnQ$, thus $\Delta G^0=+ve$ and hence the reaction is non-spontaneous.
• At equilibrium $K_p=Q$.
• $T>\frac{\Delta H}{\Delta S}$ or $T\Delta >\Delta H$. Thus $\Delta G=\Delta H=T\Delta S=-ve$, reaction is spontaneous.