# Gibbs Free Energy in Materials

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**Formula:**`ΔG = ΔH - TΔS`

## 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.

Tags: Thermodynamics, Gibbs Free Energy, Materials Science, Chemistry, Physics