To build on Richard Tolman’s interpretation of this quantity, which defines it as the difference between a letter with a double overbar and a letter with a single overbar, Donald Truhlar examined convex plots of a certain equation. This quantity is related to the enthalpy of reaction by the Evans–Polanyi principle. (15[1])This quantity (15[1])increases as a result of having a lower ZPE when a reactant is deuterated. (-5[2])As this quantity increases, (15[1]-5[2])a reaction shifts from (*) kinetic control to thermodynamic control. (-5[1])The negative of this quantity over RT appears in the exponent in the Arrhenius equation. (10[1])On a reaction coordinate diagram, (10[1])this quantity equals the difference between the maximum and starting y-values. (10[2])For 10 points, catalysts lower (10[1])what quantity, the amount of energy needed for a reaction to proceed? ■END■ (0[1])