Thermodynamic functions and their relationships: Gibbs-Helmholtz and Maxwell relations, Gibbs-Duhem equation, van’t Hoff equation. Post author By Miraj Ahmad Ansari Post date December 2, 2020 GATE CHEMISTRY Equilibrium Thermodynamic functions and their relationships: Gibbs-Helmholtz and Maxwell relations, Gibbs-Duhem equation, van’t Hoff equation. Lesson Progress 0% Complete Previous Topic Back to Lesson Next Topic ← Thermochemistry → Criteria of spontaneity and equilibrium. Absolute entropy.