Answer: lower.
- A higher
- B lower
- C the same
- D exactly zero
Correct answer: B. lower
Explanation: A catalyst works by lowering the activation energy of the reaction.
First-order decay curve: concentration halves every t½, and that half-life is constant - a defining test for first-order kinetics.
Concept context
Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step.