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Arrhenius Equation — result sheet
Estimate a rate constant from a pre-exponential factor, activation energy, and absolute temperature.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: k = A exp(-Ea/(RT)), with activation energy converted from kJ/mol to J/mol.
The Arrhenius equation models the temperature dependence of a rate constant using an energy barrier and a pre-exponential factor. It is a model of a reaction-rate parameter, not a prediction of completion time by itself.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Pre-exponential factor A — same rate unit; minimum 1.0E-6; maximum 1000000000000
- Activation energy — kJ/mol; minimum 0; maximum 1000000
- Temperature — K; minimum 1.0E-6; maximum 100000
Worked example
| Input | Value |
|---|---|
| Pre-exponential factor A | 10000000 |
| Activation energy | 50 |
| Temperature | 298.15 |
The estimated rate constant is about 0.0172 in the supplied rate unit.
Assumptions and limits
- Activation energy is entered in kJ/mol and converted to J/mol internally.
- The pre-exponential factor uses the same rate units desired for k.
- The reaction follows the simple Arrhenius form over the stated temperature range.
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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