Question

Identify the INCORRECT statement.

• A. At $273\text{ K}$, for the transition $\text{Ice}(s) \rightarrow \text{Water}(l)$, $\Delta G = 0$
• B. Entropy is an extensive property and state function
• C. For spontaneous process $(\Delta H_{\text{system}} - T\Delta S_{\text{system}}) < 0$
• D. A process will always be spontaneous at all temperatures, if $T\Delta S$ is positive

Hint:

To ensure spontaneity ($\Delta G < 0$) at all possible temperatures, a process must be exothermic ($\Delta H = -\text{ve}$) and result in an increase in disorder ($\Delta S = +\text{ve}$). Relying solely on a positive $T\Delta S$ term can fail at low temperatures if $\Delta H$ is positive.

Answer 1

The Correct Option is D