Chapter 12.4, Problem 28SSC

Interpretation Introduction

Interpretation:

The difference between melting and freezing processes must be explained.

Concept introduction:

Melting and freezing are two processes in which physical states of substances change.

Answer to Problem 28SSC

In melting process solid is converted to liquid and in freezing liquid is converted to solid.

Explanation of Solution

Melting process involves addition of thermal energy and so intermolecular force decreases and intermolecular distance increases. It converts solid to liquid. For example ice is melted to liquid water. Freezing process involves removal of thermal energy and so intermolecular force increases and intermolecular distance decreases. It converts liquid to solid. For example liquid water is converted to solid ice.

Conclusion

Melting converts liquid to solid whereas freezing converts liquid to solid.