Question

which energy diagram represents a chemical reaction with lower activation energy? a reactants products reaction progress potential energy ea δh b reactants products reaction progress potential energy ea δh graph a graph b both graphs have the same activation energy

Explanation:

Step1: Identify activation energy on graphs

Activation energy ($E_a$) is the height from reactants' energy level to the peak of the energy - diagram curve.

Step2: Compare $E_a$ values

By visual inspection, the height of the peak above the reactants' energy level is lower in Graph A compared to Graph B.

Answer:

Graph A