Chemistry · University
Gibbs energy with consistent units · formula reference
Convert entropy to the same energy unit as enthalpy. Temperature is in kelvin.
Formula
Convert entropy to the same energy unit as enthalpy. Temperature is in kelvin.
ΔG = ΔH − TΔS
Worked example
For a model reaction, ΔH=5 kJ/mol, ΔS=-9 J/(mol·K), and T=430 K. Find ΔG in kJ/mol. Round the final result to 4 decimal places if needed. Answer in kJ/mol.
ΔS=-0.009 kJ/(mol·K). Use ΔG=5−430(-0.009).
8.87 kJ/mol
Prerequisites and checking
Algebra and the topic definitions. Keep units and rounding consistent. State the model conditions before applying the formula.
Further reading and review references
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