do you put acitvation energy in kj/mol
Calculate Gibbs free energy using ΔG = ΔH - TΔS equation for chemical reactions and spontaneity. Get instant, accurate results with our easy-to-use calculator.
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Heat change at constant pressure
Disorder change
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Enter thermodynamic data to calculate Gibbs energy
Gibbs Free Energy Formulas
Thermodynamic Formula
ΔG = ΔH - TΔS
- • ΔG = Gibbs free energy change
- • ΔH = Enthalpy change
- • T = Temperature (K)
- • ΔS = Entropy change
- • ΔG < 0: Spontaneous
Equilibrium Formula
ΔG = -RT ln(K)
- • R = Gas constant (8.314 J/mol·K)
- • T = Temperature (K)
- • K = Equilibrium constant
- • ΔG = 0 at equilibrium
- • Used to predict reaction direction