Condensation is a process for which a. δg is negative at high temperature but positive at low temperature. b. δh and δs are negative at all temperatures. c. δh and δs are positive at all temperatures. d. δg is positive when condensation occurs spontaneously. e. δh, δs, and δg are positive at all temperatures.

b. ΔH and ΔS are negative at all temperatures .

Explanation:

During the process of condensation ,

The gaseous state convert to liquid state ,

Hence , the entropy of the system reduces , i.e. , the randomness decreases .

And the value for entropy is negative ,

hence ,

Δ S = negative ,

Δ H = negative ,

Since ,

The heat is releasing from system .

hence , the most appropriate option will be ΔH and ΔS are negative at all temperatures .

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.