What is this Calculator for?

This Arrhenius Equation Calculator is used to determine the rate constant (k) of a chemical reaction based on the Arrhenius equation. It's especially useful in physical chemistry and kinetics to understand how temperature and activation energy affect reaction rates.

How to Use this Calculator

1. Enter the frequency factor (A) in 1/s.
2. Input the activation energy (Ea) in J/mol.
3. Provide the temperature (T) in Kelvin.
4. The calculator will automatically compute the rate constant (k).

Formula Used

k = A × exp(-Ea / (R × T))

Where:

• k = Rate constant
• A = Frequency factor
• E_a = Activation energy (J/mol)
• R = Gas constant (8.314 J/mol·K)
• T = Temperature (K)

Example

If A = 1×10¹³ 1/s, Ea = 75,000 J/mol, and T = 298 K, then:

k = 1×10¹³ × exp(-75000 / (8.314 × 298)) = 4.79 × 10^-1 1/s