Question

For which of the following cases $\Delta S=\frac{\Delta H}{T}$?

• A. A process for which $\Delta C_P=0$ but $\Delta C_V=0$
• B. An adiabatic process
• C. An isobaric or isothermal process
• D. An isothermal reversible phase transition process

Answer 1

The correct option is D An isothermal reversible phase transition process

In phase transition process, we have

$\Delta G=0$

and we have

$\Delta G=\Delta H-T\Delta S=0$

so, $\Delta H=T\Delta S$

and $\Delta S=\frac{\Delta H}{T}$