2.
(07.01 MC)

A potential energy diagram is shown.

A graph is plotted with Potential Energy in KJ on the y axis and Reaction Pathway on the x axis. The graph starts at 150 on the y axis and it is initially horizontal, labeled Reactants, and then rises up as a smooth curve and reaches its peak when y is 200 kilojoules. The curve comes down until y is 50 kilojoules where it becomes horizontal again, and it is labeled Products.

What is the activation energy of this reaction? (5 points)

50 kJ

100 kJ

150 kJ

200 kJ