Activation Energy Formula:
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Definition: Activation energy is the minimum amount of energy required to initiate a chemical reaction. For zero-order reactions, the rate is independent of the concentration of reactants.
Purpose: This calculator helps determine the activation energy needed for zero-order reactions using the Arrhenius equation.
The calculator uses the formula:
Where:
Explanation: The formula calculates the energy barrier that must be overcome for the reaction to proceed.
Details: Knowing activation energy helps predict reaction rates, design chemical processes, and understand reaction mechanisms.
Tips: Enter the temperature in Kelvin, frequency factor in m³/mol·s, and rate constant in mol/m³·s. All values must be > 0.
Q1: What is a zero-order reaction?
A: A reaction where the rate is independent of the concentration of reactants.
Q2: What are typical values for frequency factor?
A: Frequency factors typically range from 10⁶ to 10¹⁴ s⁻¹ for gas-phase reactions.
Q3: Why is temperature important in this calculation?
A: Reaction rates are highly temperature-dependent according to the Arrhenius equation.
Q4: What units should I use for input?
A: Temperature in Kelvin, frequency factor in m³/mol·s, and rate constant in mol/m³·s.
Q5: Can I use this for non-zero-order reactions?
A: This specific formula is for zero-order reactions. Other reaction orders require different approaches.