Chapter 15.1, Problem 7SSC

Interpretation Introduction

Interpretation:

The energy changes in exothermic and endothermic process are to be explained.

Concept introduction:

Exothermic reaction: A reaction is exothermic if heat is released in the chemical reaction.

Endothermic reaction: A reaction is endothermic if heat is absorbed in the chemical reaction.

Answer to Problem 7SSC

In exothermic process, chemical potential energy is converted into heat.

In endothermic process, heat is absorbed and converted into chemical potential energy.

Explanation of Solution

In exothermic process, the enthalpy of products is less than reactants and that amount is converted into heat.

In endothermic process, the enthalpy of products is more than reactants and that increased amount is due to absorption of heat.

Conclusion

Thus in both reactions, one form of energy is converted into another form of energy.