Final answer:
At constant temperature, reactions with lower activation energies proceed more rapidly, as the lower energy barrier allows for more successful molecular collisions.
Step-by-step explanation:
The Arrhenius equation (k = Ae-Ea/RT) describes the relationship between the rate constant (k), activation energy (Ea), frequency factor (A), ideal gas constant (R), and absolute temperature (T). This equation tells us how various factors affect the rate at which reactions proceed. Among the given statements, the true one is that at constant temperature, reactions with lower activation energies proceed more rapidly. This is because a lower activation energy means there is a lower energy barrier for the reaction to occur, allowing more molecular collisions to result in successful reactions.