A reaction $straight A plus straight B space rightwards arrow space straight C plus straight D plus straight q$ is found to have a positive entropy change. The reaction will be

possible at high temperature

possible only at low temperature
not possible at any temperature
possible at any temperature

Solution

possible at any temperature

Option space left parenthesis iv right parenthesis space is space correct. space Here space increment straight H space equals space minus ve space and space increment straight S space equals space plus ve therefore space space space space space increment straight G space equals space increment straight H space minus space straight T increment straight S

For the reaction to be spontaneous, AG should be –ve which will be so at any temperature.

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