Answer:
Only one—(i), or (ii), or (iii)—increases the reaction rate.
Step-by-step explanation:
Which of the following changes always leads to an increase in the rate constant for a reaction?
- Decreasing the temperature. NO. A lower temperature leads to a slower reaction because the molecules have less energy to react.
- Decreasing the activation energy. YES. According to the Arrhenius equation, the lower the activation energy, the higher the rate constant.
- Making the value of ΔE more negative. NO. A more negative ΔE means a reaction is more spontaneous but not faster.