Question

For a chemical reaction, $\Delta H$ and $\Delta S$ are negative. State, giving reason, under what conditions this reaction is expected to occur spontaneously.

Answer 1

Let us consider the $\Delta G=\Delta H-T\Delta S$

In order to any reaction to be spontaneous $\Delta G$ must have Positive value.

Therefore,

$\Delta H$ and $\Delta S$ are negative then,

$T\Delta S<\Delta H$.