Question

For independent processes at $300K$

Process	$\Delta H/kJmo{l}^{-1}$	$\Delta S/J{K}^{-1}$
A	-25	-80
B	-22	40
C	25	-50
D	22	20

The number of non-spontaneous processes from the following is

Answer 1

Answer: 2

$\Delta G=\Delta H-T\Delta S$
$A:\Delta G\left(Jmo{l}^{-1}\right)=-25\times 10^3+80\times 300:-ve$
$B:\Delta G\left(Jmo{l}^{-1}\right)=-22\times 10^3-40\times 300:-ve$
$C:\Delta G\left(Jmo{l}^{-1}\right)=25\times 10^3+300\times 50:+ve$
$D:\Delta G\left(Jmo{l}^{-1}\right)=22\times 10^3-20\times 300:+ve$
Processes $C$ and $D$ are non-spontaneous.