Summary: A Monte Carlo calculation has been performed to evaluate the yields expected from the kinetic theory of hot atom reactions for various combinations of parameters. The calculations here have been performed for the elastic, isotropic model and for an isotropic, pseudoelastic model in which the maximum energy loss is treated as a free parameter. The total hot yield, Y, is given for a pure Compound with sufficient accuracy to be useful by the formula Y = 1 - exp (- I/α). The hot yield from recoil tritium reaction with A diluted by helium is approximately given by YA = 1 - exp(-ƒAIA/αAB ). This formula falls to describe recoil tritium behavior in other inert gases because of changing values of αAB in the reactive chemical range.