Question

Solids melt when solid particles _____ energy, liquids freeze when liquid particles _____ energy.

-LOOSE, GAIN
-GAIN, LOOSE
-GAIN, GAIN
-LOOSE, LOOSE

Answer 1

The most common examples of dissolving involve a solid and a liquid, usually water. ... If a solid dissolves on mixing its particles break apart and form a loose association with the liquid (solvent) particles. A solid will not dissolve in a liquid if its particles are unable to form links to the liquid particles.

Answer 2

Solids melt when solid particles GAIN energy, liquids freeze when liquid particles LOSE energy.

Let's take an example :

• Ice is a solid material.

• It absorbs (i.e. gains ) energy in the form of heat (i.e. Latent Heat of Fusion) and converts from ice to water (i.e. from solid to liquid state).

• Similarly, water releases energy (i.e. loses) in the form of heat and gets converted to ice (i.e. solid state).

• Similar things can be said when liquid changes to vapour (or gas) and when gas changes to liquid.

$\star$ Hope It Helps.