Chapter 15, Problem 15.17CP

Suggest a physical interpretation of the dependence of the Gibbs energy on the pressure.

Briefly distinguish between spontaneity criteria of simple and non simple systems im terms of Gibbs and Helmholtz free energies

Without doing a calculation, decide whether the presence of (a) attractive, (b) repulsive interactions between gas molecules will raise or lower the molar Gibbs energy of a gas relative to its 'perfect' value.