Problem: For each of the following pairs, predict which substance has a higher entropy per mole at a given temperature.He(g) at 5 atm pressure or He(g) at 1.8 atm pressure.

We are asked to predict which substance has a higher entropy per mole at a given temperature.

We are given:

He_(g) at 5 atm pressure or He_(g) at 1.8 atm pressure

Recall that entropy is the degree of chaos or disorder of a system. For a given process, entropy (ΔS) will either increase or decrease.