two point activation energy calculator
Free calculate activation energy using the arrhenius equation with rate constants and temperatures. Get instant, accurate results with our easy-to-use calculator.
Enter Reaction Data
Units: s⁻¹, M⁻¹s⁻¹, etc.
Units: s⁻¹, M⁻¹s⁻¹, etc.
Results
Enter reaction data to calculate activation energy
Activation Energy Formula
Arrhenius Equation
Ea = -R × ln(k₂/k₁) / (1/T₂ - 1/T₁)
- • Ea = Activation Energy (J/mol)
- • R = Gas constant (8.314 J/mol·K)
- • k₁, k₂ = Rate constants
- • T₁, T₂ = Absolute temperatures (K)
Key Concepts
- • Activation energy is the minimum energy required for a reaction
- • Higher activation energy = slower reaction
- • Temperature increase exponentially increases reaction rate
- • Typical range: 10-200 kJ/mol