Question

question 7 (1 point)
potential energy diagram
use the potential energy diagram. what is shown by the letter a?
the activation energy of the forward reaction
the activation energy of the reverse reaction
the transition state
the heat of reaction
the entropy of the reaction

Explanation:

In a potential energy diagram, the heat of reaction ($\Delta H$) is the difference in potential energy between the reactants and the products. The letter A represents this difference. The activation energy (forward or reverse) would be related to the energy barrier (like B in some contexts). The transition state is the peak of the energy curve. Entropy is not directly represented as a vertical difference in a simple potential - energy - vs - reaction - progress diagram like this.

Answer:

the heat of reaction