Use this Arrhenius equation calculator to determine the reaction rate constant of a chemical reaction at different temperatures.
Arrhenius Equation Calculator
The Arrhenius Equation is used to calculate the rate constant (k) of a chemical reaction. It takes into account the activation energy necessary for the reaction (Ea), the temperature (T) at which the reaction takes place, and the frequency factor (A) which represents the frequency of collisions between reactant molecules with the correct orientation.
How to Use the Calculator
To use this calculator, input the activation energy in joules per mole (J/mol), the universal gas constant (typically 8.314 J/mol·K), the temperature in Kelvin, and the frequency factor (a number representing the likelihood of a successful collision). After filling these details, click on the “Calculate” button to compute the rate constant. The result will be displayed in the result field.
How It Calculates the Results
The calculator uses the Arrhenius formula:
k = A * e(-Ea / (R*T))
where k is the rate constant, A is the frequency factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin. This equation shows that the rate constant (k) for a reaction increases as the temperature increases.
Limitations
The Arrhenius Equation assumes that all collisions between reactant molecules have equal energy, which is not always the case. As such, this calculator will give an approximation but may not reflect the exact rate constant in every scenario. It is also worth noting that the equation only applies under the assumption that the reaction is governed by collision theory and that the reaction has a single, simple path from reactants to products.