Gibbs Free Energy in Materials

Introduction to Gibbs Free Energy Calculator

Gibbs free energy (ΔG) is a thermodynamic property that measures the maximum amount of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure. The Gibbs free energy is given by the formula ΔG = ΔH - TΔS, where ΔH is the change in enthalpy (heat transfer at constant pressure), T is the absolute temperature, and ΔS is the change in entropy.

Parameter usage:

• deltaH= change in enthalpy (Joules or other energy units)
• deltaS= change in entropy (Joules per Kelvin or other entropy units)
• temperature= absolute temperature (Kelvin)

Output:

• gibbs_free_energy= Gibbs free energy (same units as ΔH)

Data validation

All parameters must be specified as numbers. The temperature must be in Kelvin and must be greater than zero to avoid division by zero or a negative absolute temperature, which is nonphysical.

Summary

The Gibbs Free Energy calculator is used in chemistry and physics to predict whether a process will occur spontaneously at constant pressure and temperature. ΔG < 0 indicates a spontaneous process, ΔG = 0 is at equilibrium, and ΔG > 0 is non-spontaneous.