Question

what does a reaction energy diagram represent?
a. the changes in the reaction rate with time
b. the changes in phases with temperature
c. the changes in concentrations with time
d. the changes in energy during a reaction

Explanation:

A reaction energy diagram shows the energy changes during a chemical reaction. The x - axis represents the reaction progress, and the y - axis represents energy. It does not show reaction rate vs time (A), phase changes vs temperature (B), or concentration changes vs time (C).

Answer:

D. The changes in energy during a reaction