Final answer:
The activation energy for the gas-phase decomposition of t-butyl propionate is 164 kJ.
Step-by-step explanation:
The activation energy for the gas-phase decomposition of t-butyl propionate is 164 kJ. Activation energy refers to the minimum amount of energy required for a chemical reaction to occur. It acts as a barrier that must be overcome for the reactants to form products. In this case, the activation energy of t-butyl propionate decomposition is 164 kJ, which means that this much energy needs to be supplied to the reactants in order for the reaction to take place.