Question

question 23 of 27 the enthalpy of a reaction is -394 kj/mol. how would you describe the reaction? a. exothermic b. spontaneous c. endothermic d. nonspontaneous

Explanation:

Exothermic reactions have a negative enthalpy change ($\Delta H<0$), releasing heat to the surroundings. Since the given enthalpy of the reaction is - 394 kJ/mol (negative), it is an exothermic reaction. Spontaneity depends on both enthalpy and entropy ($\Delta G=\Delta H - T\Delta S$), and just the enthalpy value doesn't determine spontaneity. Endothermic reactions have a positive enthalpy change.

Answer:

A. Exothermic