Question

question time! when an ____ reaction occurs in an aqueous solution, heat will be released to the water. exothermic endothermic how did i do? question time! enthalpy is the external energy of the system, e, which includes heat plus the product of pressure and volume. true false how did i do?

Explanation:

1. For the first question, exothermic reactions release heat to the surroundings. In an aqueous - solution, water is part of the surroundings, so heat is released to water in an exothermic reaction. Endothermic reactions absorb heat.
2. For the second question, enthalpy ($H$) is the internal energy of the system, $E$, plus the product of pressure and volume ($PV$), i.e., $H = E+PV$, not the external energy.

Answer:

1. A. exothermic
2. B. False