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Gibbs Free Energy Change Calculator — result sheet
Calculate Gibbs free-energy change from enthalpy change, entropy change, and absolute temperature.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: ΔG = ΔH−TΔS, with entropy converted from J/(mol·K) to kJ/(mol·K).
The unit conversion is shown before combining the thermal entropy term with enthalpy.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Enthalpy change — kJ/mol; minimum -1000000; maximum 1000000
- Entropy change — J/(mol·K); minimum -1000000; maximum 1000000
- Absolute temperature — K; minimum 1.0E-6; maximum 1000000
Worked example
| Input | Value |
|---|---|
| Enthalpy change | -50 |
| Entropy change | -100 |
| Absolute temperature | 298.15 |
ΔG = −20.185 kJ/mol.
Assumptions and limits
- Enthalpy is in kJ/mol, entropy is in J/(mol·K), and temperature is positive kelvin.
- The selected values represent the same process and state conditions.
- Activity corrections, pressure-volume work, heat-capacity variation, and reaction kinetics are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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