Question

the amount of energy necessary to move from reactants to the transition state is what? endothermic enthalpy activation energy exothermic

Explanation:

Activation energy is defined as the minimum amount of energy required for reactants to reach the transition - state and start a chemical reaction. Endothermic and exothermic describe the overall heat change of a reaction, and enthalpy is a measure of the total heat content of a system.

Answer:

C. Activation energy