Question

explain why a solid expands when it is heated

Answer 1

Answer:

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.

Explanation:

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Answer 2

Question:-

$\sf\fbox{explain why a solid expands when it is heated}$

Answer:-

Just about every (but not all) solids expand with an increase in temperature. Why? Before going to the answer, let’s look at a common model of a solid – the ball and spring model. In this model, solid matter is made of tiny little balls connected by springs. The balls would be the atoms that.In this model, solid matter is made of tiny little balls connected by springs. The balls would be the atoms that make up the material and the springs represent the interactions each atom has with it's neighbors. These tiny balls don't just sit there, they oscillate around just a little bit. But clearly matter isn't made of tiny little springs, right? Right. So, even though this model is not exactly true, it's still very useful. With this ball and spring model, we can explain:

Given:-

$\sf\fbox{•Heated•}$

Just about every (but not all) solids expand with an increase in temperature. Why? Before going to the answer, let's look at a common model of a solid - the ball and spring model.