a) Why a solid expands when it is heated.
b) Why solids and liquids cannot be compressed but gases can be compressed.
c) Why liquids and gases can flow.
Answers
Explanation:
a)All three states of matter (solid, liquid and gas) expand when heated. The atoms themselves do not expand, but the volume they take up does. When a solid is heated, its atoms vibrate faster about their fixed points. The relative increase in the size of solids when heated is therefore small.
b)In gases the interparticle space is very large and hence they are compressible, but in case of solids and liquids particles are close to each other and hence cannot be compressed.
c)Liquids, solids, and gases. Liquids flow because the intermolecular forces between molecules are weak enough to allow the molecules to move around relative to one another. Intermolecular forces are the forces between neighboring molecules. ... First, liquids share the ability to flow with gases.