Q16.55P
Question
( a) For a reaction with a given Ea, how does an increase in T affect the rate?
(b) For a reaction at a given T, how does a decrease in Ea affect the rate?
Step-by-Step Solution
Verified(a) (a) As the temperature rises, the fraction of molecules with energy greater than the threshold energy increases. As a result, more molecules have the activation energy to collide. As a result, the number of collisions rises, as does the rate of reaction.
(b) When the activation energy drops, more molecules have the activation energy required for collisions. As a result, the number of collisions rises, as does the rate of reaction.
At any given temperature, the kinetic energy of the reactant molecules is distributed. At any given temperature, collisions between molecules have a range of energies.
The percentage of molecules with energy greater than the threshold energy grows as the temperature rises. As a result, more molecules have the activation energy needed to collide. This increases the number of collisions and, as a result, the rate of reaction.
The kinetic energy of the reactant molecules is dispersed at every given temperature. Collisions between molecules have a variety of energies at any given temperature.
More molecules have the activation energy necessary for collisions when the activation energy decreases. This increases the number of collisions and, as a result, the rate of reaction.