Gibbs Energy Calculator

Calculate Gibbs free energy change and reaction spontaneity using thermodynamic data

Temperature (K)(e.g., 298.15 for 25°C)

Enthalpy Change (ΔH) (kJ/mol)(+ for endothermic, - for exothermic)

Entropy Change (ΔS) (J/(mol·K))(J/mol·K)

Pressure (bar)(for gas-phase reactions)

Calculation Type

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Quick Tips

1Use consistent units throughout calculations
2Consider significant figures in results
3Document experimental conditions
4Verify results with control calculations