Why temperature increases reaction rate
Raising the temperature increases a reaction's rate mainly because:
Answer C: explanation for every choice
A
Catalysts lower the activation energy. Temperature does not.
B
K may change with temperature, but K describes equilibrium, not rate.
C
Correct. Per the Arrhenius equation, k = Ae−Ea/RT, so higher T increases the rate constant.
D
ΔH is essentially unchanged by temperature and does not set the rate.
TakeawayHigher temperature puts more molecules over the activation energy barrier.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID cp53.