As the temperature increases, what happens to the rate of reaction according to collision theory?

• A. More collisions occur and the rate increases
• B. Collisions decrease
• C. Rate remains the same
• D. Temperature has no effect

Answer: (A)

Increasing temperature changes how fast particles move, so they collide more often and with greater energy. This means more collisions become effective at initiating a reaction, not only happening more frequently but also surpassing the activation energy more often. Because a reaction rate depends on how many successful collisions occur per unit time, the rate rises as temperature goes up. The idea that collisions would decrease, or that temperature has no effect or the rate stays the same, contradicts collision theory.