Question

The enthalpy and entropy change for a chemical reaction are $–2.5\times {10}^3$ cal and 7.4 cal $de{g}^{–1}$ respectively. The reaction at 298 K will be:

• A. Spontaneous
• B. Reversible
• C. Can't say anything
• D. Non-spontaneous

Answer 1

The correct option is A

Spontaneous

$\Delta G=\Delta H-T\Delta S$
= -ve - (+ve) (+ve)
= -ve $\Rightarrow$ spontaneous