Question

Which of the following conditions regarding a chemical process ensures its spontaneity at all temperature ?

• A. $\Delta$H > 0, $\Delta$G < 0
• B. $\Delta$H < 0, $\Delta$S > 0
• C. $\Delta$H < 0, $\Delta$S < 0
• D. $\Delta$H > 0, $\Delta$S < 0

Answer 1

Answer: (B)

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

Answer 2

For spontaneity $\Delta$G < 0, which is possible when $\Delta$H < 0, DS > 0.