Chapter 14.1, Problem 1RQ

Interpretation Introduction

Interpretation: Difference between inter-molecular and intra-molecular forces is to be given.

Concept introduction: Both inter-molecular and intra-molecular forces are somehow related to the molecules of a compound. Inter-molecular forces exist outside the molecules whereas intra-molecular forces exist inside the molecules.

Answer to Problem 1RQ

Inter-molecular forces exist outside the molecules whereas intra-molecular forces exist inside the molecules.

Explanation of Solution

Intra-molecular forces are chemical bonds between the atoms of the same molecule. These forces result in the formation of chemical compounds. There is no effect of phase change on these forces and thus they are permanent in nature. They may be covalent or ionic in nature.

Inter-molecular forces are a kind of binding forces that bind the molecules together. The strength of these forces affects the physical state of the compound in which they are present. They are of various types namely Hydrogen bond, dipole-dipole bond, ion-induced dipole forces, ion-dipole forces and London dispersion forces.

Conclusion

Inter-molecular forces exist outside the molecules whereas intra-molecular forces exist inside the molecules.