Directions
Read the following questions. Choose the right answer.
There is only ONE correct answer to each question.
A catalyst increases the rate of a chemical reaction by:
- increasing the enthalpy of the reaction
- decreasing the enthalpy of the reaction
- increasing the activation energy of the reaction
- decreasing the activation energy of the reaction
Show answer
Correct answer: D. decreasing the activation energy of the reaction
Why
A catalyst provides an alternative reaction pathway with a lower activation energy, which speeds up the reaction without changing its overall enthalpy.