frequency factor

frequency factor

[′frē·kwən·sē ‚fak·tər] (physical chemistry) The constant A (or ν) in the Arrhenius equation, which is the relation between reaction rate and absolute temperature T ; the equation is k = Ae- (Δ Hact/ RT), where k is the specific rate constant, Δ Hactis the heat of activation, and R is the gas constant.