Gibbs free-energy change ΔG and entropy change ΔS

Definitions ⦵       Standard pressure (100kPa), usually with a stated temperature (e.g. 298K) ΔG⦵ Gibbs free-energy change, measured in kJ mol−1 ΔH⦵ Enthalpy change, measured in kJ mol−1 T   Temperature measured in Kelvin ΔS⦵ Entropy change, measured in J K−1 mol−1 The feasibility of a physical or a chemical change depends on the balance between the thermodynamic quantities of enthalpy