Arrhenius Equation for Zero Order:
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Definition: The Arrhenius constant (A), also called the frequency factor, represents the frequency of collisions between reactant molecules with proper orientation for reaction.
Purpose: It's a key parameter in the Arrhenius equation that helps predict reaction rates at different temperatures.
The calculator uses the Arrhenius equation for zero-order reactions:
Where:
Explanation: The equation relates the reaction rate constant to temperature and activation energy.
Details: The Arrhenius constant helps predict how reaction rates change with temperature and is essential for reaction kinetics studies.
Tips: Enter the rate constant (k₀), activation energy (Eₐ) in J/mol, and temperature in Kelvin. All values must be > 0.
Q1: What's the difference between A and k₀?
A: A is the frequency factor (maximum possible rate), while k₀ is the actual rate constant at a specific temperature.
Q2: What are typical units for A?
A: For zero-order reactions, A typically has units of mol/m³·s (same as the rate constant).
Q3: How does temperature affect A?
A: The Arrhenius constant A is theoretically temperature-independent, though in practice it may vary slightly.
Q4: What's a typical value for A?
A: Values vary widely, from 10⁶ to 10¹⁴ for different reactions, depending on molecular complexity.
Q5: Why is this specific to zero-order reactions?
A: While the Arrhenius form is similar for all orders, the units and interpretation of A differ by reaction order.