Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter. The reaction causes the temperature of the resulting solution to fall below room temperature. Which of the following statements is TRUE? None of these statements are true. a.The products have a lower potential energy than the reactants. b.Energy is leaving the system during reaction. The reaction is exothermic. c.This type of experiment will provide data to calculate ΔErxn.d. The mixing is endothermic.
e. None of the above statements are true.

The reaction causes the temperature of the resulting solution to fall below the initial temperatures of the component solutions. Thus, it can be concluded that the mixing reaction is endothermic.

Recall that:

energy in the form of heat is given off by exothermic reactions
energy is absorbed by endothermic reactions

Thus, in exothermic reactions, the temperature of each reactant is usually lower than that of their reaction with each other while in endothermic reactions, the temperature of each reactant is higher than that of their reaction with each other.

In this case, the temperature of the mixture is lower than that of individual solutions. This means that energy is being absorbed from the surrounding. The reaction is, thus, endothermic.

More on endothermic reactions can be found here: https://brainly.com/question/2192784