Question

For the process $A\left(1,0.05atm,32^{\circ }C\right)\to A\left(g,0.05atm,32^{\circ }C\right)$
The correct set of thermodynamic parameters is

• A. $\Delta G=0$ and $S\Delta =-ve$
• B. $\Delta G=0$ and $S\Delta =+ve$
• C. $\Delta G=+ve$ and $S\Delta =0$
• D. $\Delta G=-ve$ and $S\Delta =0$
• E. $\Delta G=0$ and $S\Delta =0$

Answer 1

Answer: (B)

(i) $\because n$ and $T$ are constant.

$\therefore \Delta G=0$ i.e.

System is equilibrium

(ii) $\because P\to$ decreases

$\therefore \Delta S\to$ increases i.e. $(+)ve$

$\therefore$ Correct answer is $\to (B)$