A catalyst is introduced to a three-step reaction mechanism
CHEMISTRY · Single correct · A Level · Chemistry · Kinetics · Kinetics
Problem
A catalyst is introduced to a three-step reaction mechanism. Which change to the energy profile is most likely to occur?
(a) The activation energy decreases, and the overall ΔH becomes more negative
(b) The activation energy remains the same, but the overall ΔH decreases
(c) The activation energy for each elementary step decreases, while the overall enthalpy change, ΔH, remains the same
(d) The activation energy for each elementary step increases, while ΔH remains the same