Question

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

• A. $\Delta$H > 0 and $\Delta$S < 0
• B. $\Delta$H < 0 and $\Delta$S > 0
• C. $\Delta$H < 0 and $\Delta$S < 0
• D. $\Delta$H < 0 and $\Delta$S = 0

Answer 1

Answer: (B)

$\Delta$H < 0 and $\Delta$S > 0

Answer 2

$\Delta G = \Delta H - T \Delta S$
For spontaneous process
$\Delta S = +ve$
$\Delta H = - ve$