Question

For an endothermic reaction, $\Delta$S is positive. Then the reaction is:

• A. feasible when T $\Delta$ S > $\Delta$ H
• B. feasible when$\Delta$ H > T $\Delta$ S
• C. feasible at all temperatures
• D. not feasible at all

Answer 1

The correct option is A feasible when T $\Delta$ S > $\Delta$ H

For endothermic reaction $\Delta H=$ +ve
$\Delta S=$ +ve
$\Delta G=\Delta H-T\Delta S$
$\Delta G$ can be negative or positive for reaction to be feasible $\Delta G$ should be negative
$\Delta H-T\Delta S<O$
$\therefore \Delta H<T\Delta S$

Option A is correct.