The change in enthalpy shows on the graph is the red arrow shows that enthalpy is positive, indicating an endothermic reaction.
<h3>What is potential energy?</h3>Energy is the basic thing to do any reaction or any process. There are many kinds of energy are present that are use indifferent processes.
Potential energy is the energy that is saved to do a work, or the energy that is present before a work occurred.
The graph is attaches below.
Thus, the correct option is A. The red arrow shows that enthalpy is positive, indicating an endothermic reaction.
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