14.4 Collision Theory and the Arrhenius Equation

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    COLLISION THEORY
    (Requirements for a Chemical Reaction)
    1. Collision
    2. Proper orientation of reactant molecules
    3. Sufficient energy for a reaction to occur

    *An increase in temperature increases the collision frequency and the percentage of high energy collisions.

    Rate Constants and the Arrhenius Equation

    rate constant 01
    rate constant 02
    Factors Affecting the Rate Constant
    The rate constant, k, increases with increasing temperature.
    The rate constant, k, increases with decreasing activation energy (by adding a catalyst).

    If the rate constant of a reaction is 0.0014s-1 at 25°C for a reaction with an activation energy of 40kJ/mol, then what is the value of the rate constant at 50°C? (R = 8.314J/mol•K)