Question

question 4 of 32 how would the graph below change if a catalyst were added to the reaction? graph: potential energy (y - axis) vs. reaction progress (x - axis), labeled 1 (reactants’ energy), 2 (activation energy peak), 3 (products’ energy) options: a. parts 1, 2, and 3 would be lower. b. part 2 would be lower, and parts 1 and 3 would be unchanged. c. parts 1 and 3 would be higher, and part 2 would be unchanged. d. part 1 would be higher, and part 2 would be lower.

Explanation:

A catalyst lowers the activation energy (the energy barrier, which is Part 2 in the graph) by providing an alternative reaction pathway. It does not change the initial (Part 1) or final (Part 3) potential energy of the reactants and products, respectively. So Part 2 (activation energy) decreases, while Parts 1 and 3 remain unchanged.

Answer:

B. Part 2 would be lower, and parts 1 and 3 would be unchanged.