Question

What is the intermolecular force of $N{{H}_{3}}$?

Answer 1

The reaction between particles or atoms of different molecules is intimidated by intermolecular forces or secondary forces. When compared to intramolecular forces, intermolecular forces are usually weaker.

Complete answer:
Intermolecular forces are the forces that hold two molecules together. They exist in between the molecules.
The forces of repulsion or attraction between the atoms of a molecule and the atoms of the neighboring molecule are an example of intermolecular forces.
There are three types of intermolecular forces that form a bond between molecules.
1. Dipole-Dipole Interaction- Partially negatively charged part of a molecule interacts with a partially positive part of the neighboring molecule.
2. Hydrogen Bonding - A kind of dipole interaction in which the hydrogen atom is bonded to the electronegative atom like oxygen, fluorine, nitrogen, etc. High energy is required to break these bonds and that is why water or hydrogen compounds have high melting and boiling points.
3. London forces - These are the forces that are present everywhere, between all types of molecules. The strength of London forces is directly proportional to the number of electrons a molecule has.
Among these three, dipole-dipole interactions have the highest strength, and the London forces have the weakest strength.
Now, in $N{{H}_{3}}$, the atoms experience London forces and hydrogen bonding.

Note: The intermolecular forces can be used to calculate and find out various physical properties of a molecule. Some of these properties are melting points, vapourization, boiling points, enthalpies of fusions, and density.