Question

When will be change in Gibb's free energy always negative?

Options

• ΔH and ΔS both positive at low temperature.

• ΔH = negative, ΔS = positive, at all temperatures.

• ΔH = positive, ΔS = negative at all temperatures.

• ΔH and ΔS both negative at high temperature

Answer 1

ΔH = negative, ΔS = positive, at all temperatures.

Explanation:

ΔG = ΔH - TΔS

-ve = - ve   +ve    ...at all temperatures.