Question

An energy profile for the reaction A⇌B (left), and the change in concentration of B as a function of time (right), with and without a catalyst. Green curves show the reaction with a catalyst; black curves show the reaction without a catalyst. Part A What quantity dictates the speed of a reaction? What quantity dictates the speed of a reaction? the energy difference between the initial state and the transition state the energy difference between the initial state and the final state

Answer 1

What quantity dictates the speed of a reaction? The activation energy

Step-by-step explanation:

According to the collision theory, when molecules collide, they must overcome an energy barrier for the reaction to take place. This energy, known as activation energy, is represented by the difference in energy between the initial state and the transition state. The higher the activation energy, the slower the reaction. That's why catalysts reduce the activation energy to accelerate the reaction.