Class 12 Chemistry - Chapter The Solid State NCERT Solutions | 'Stability of a crystal is reflected

Welcome to the NCERT Solutions for Class 12th Chemistry - Chapter The Solid State. This page offers a step-by-step solution to the specific question from Excercise ".$ex_no." , Question 6: 39 stability of a crystal is reflected in themag....
Question 6

'Stability of a crystal is reflected in themagnitude of its melting point'. Comment. Collect melting points of solid water, ethyl alcohol, diethyl ether and methane from a data book. What can you say about the intermolecular forces between these molecules?

Answer

In context with the solid state of a crystal, the stability of a crystal is dependent upon the packaging of atoms in it. The stronger the intermolecular forces of attraction present in the structure, the higher will be the stability of the crystal and vice versa.

Melting point of:

Solid water→ 273 K → has strong intermolecular hydrogen bonding

Ethyl alcohol → 155 K → has intermolecular hydrogen bonding

Diethyl Ether→156 K → has dipole-dipole interaction

Methane → 91 K → has weak Vander waals forces

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