Catalysts decrease this quantity.
This quantity is linearly related to a type of enthalpy in the EvansÂ–Polanyi principle. A formula that models the probability of crystal defects replaces this quantity with the vacancy energy. Because deuterium lowers the zero-point energy, it increases this quantity, in the kinetic isotope effect. This quantity is replaced by "delta-G double dagger" in the governing equation for (*)  transition state theory. The difference between the forward and reverse forms of this quantity equals the reaction heat. This quantity is usually experimentally calculated as negative  R  times the slope of a line that is formed by plotting the log of rate constant against one-over-temperature on an Arrhenius plot. Catalysts decrease this quantity. For 10 points, name this energy "hump" that a reaction must overcome.
This quantity is linearly related to a type of enthalpy in the EvansÂ–Polanyi principle.
activation energy  [or free  energy of activation ; or  activation enthalpy ]