Chapter 15, Problem 30A

Interpretation Introduction

Interpretation: To explain why water has a high boiling point.

Concept Introduction: The boiling point is considered the temperature at which the vapor pressure of the liquid becomes equal to atmospheric pressure. At this temperature, the liquid is converted to vapor. The boiling point is affected by the intermolecular forces of attraction between the molecules.

Answer to Problem 30A

There is a hydrogen bonding present between the water molecules. Since hydrogen bonding between the water molecules is strong, the boiling point will be high.

Explanation of Solution

There is hydrogen bonding between the water molecules in water. As the intermolecular forces of attraction are strong, the boiling point will increase. Among the intermolecular forces, hydrogen bonding is the strongest intermolecular force and hence, the boiling point will be higher in water.

Conclusion

As the intermolecular forces of attraction increase, a higher energy will be required to break these intermolecular forces. Therefore, boiling point and intermolecular forces will be proportional to each other.