Question

From the values of

Δ

H and

Δ

S, predict which of the following reactions would be spontaneous at

28

°

C:

reaction A:

Δ

H = 10.5 kJ/mol,

Δ

S = 30.0 J/K

·

mol;

	spontaneous
	nonspontaneous
	impossible to tell

reaction B:

Δ

H = 1.8 kJ/mol,

Δ

S = −113 J/K

·

mol,

	spontaneous
	nonspontaneous
	impossible to tell

If either of the reactions is nonspontaneous, can it(they) become spontaneous?

	yes, reaction A can become spontaneous
	yes, reaction B can become spontaneous
	yes, both reactions can become spontaneous
	no, neither reaction can become spontaneous

If either of the reactions is nonspontaneous but can become spontaneous, at what temperature might it become spontaneous?