An increase in temperature affects the reaction rate by decreasing the velocities of particles that collide in the reaction. increasing the number of molecules that have sufficient kinetic energy to react. increasing the number of molecules that have sufficient potential energy to react. decreasing the energy that particles need to overcome the energy activation barrier.
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An increase in temperature results in more collisions between the particles. As a result, the particles which earlier had only potential energy will now gain more energy because of temperature increase.
Thus, this gain of energy is the kinetic energy and this will also increase the number of molecules sufficient to participate in the reaction.
Hence, we can conclude that an increase in temperature affects the reaction rate by increasing the number of molecules that have sufficient kinetic energy to react.
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