Activation Energy Calculator
What activation energy follows from rate constants at two temperatures? Enter the stated values to calculate this model.
Reference calculation or estimate for example inputs; assumptions and limitations apply.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| First rate constant (same rate unit) | Enter first rate constant in same rate unit; use the same basis as the other measurements. |
| Second rate constant (same rate unit) | Enter second rate constant in same rate unit; use the same basis as the other measurements. |
| First temperature (K) | Enter first temperature in K; use the same basis as the other measurements. |
| Second temperature (K) | Enter second temperature in K; use the same basis as the other measurements. |
Understanding your result
The result is a scientific reference calculation under the model assumptions on this page. It does not assess hazards, chemical compatibility, purity, solubility, equipment limits or clinical meaning.
Common mistakes
- Using solvent volume in place of final solution volume, or mass concentration in place of molar concentration.
- Ignoring units, reaction coefficients, activity assumptions or the stated temperature/model limits.
Check your calculation
- Check the units and balance/coefficients against the worked example. For real laboratory work, verify SDS information and the applicable procedure independently.
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What activation energy follows from rate constants at two temperatures?
What activation energy follows from rate constants at two temperatures? Enter the stated values to calculate this model.
Common uses
- What activation energy follows from rate constants at two temperatures
How it works
Use the logarithm of the two rate constants and the difference in inverse absolute temperatures in the two-point Arrhenius relation. The same mechanism and approximately constant activation energy are assumed.
Worked example
Enter First rate constant: 1 same rate unit; Second rate constant: 2 same rate unit; First temperature: 300 K; Second temperature: 400 K. Results: Activation energy: 6915.775585972775 J/mol.