Answer: activation energy.
- A bond energy
- B activation energy
- C kinetic energy
- D potential energy
Correct answer: B. activation energy
Explanation: Only molecules with energy ≥ the activation energy can cross the barrier and react.
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.