Answer: Lowering activation energy.
- A Increasing temperature
- B Lowering activation energy
- C Increasing reactant concentration
- D Changing the products
Correct answer: B. Lowering activation energy
Explanation: A catalyst provides an alternative pathway with a lower activation energy barrier.
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.