Question

How can you show that air expands on heating

Answer 1

As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.

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Answer 2

It is because the particles of air pn becoming warm, move away from each other and take up more space . So we can say that air on becoming hot occupies more space. since the particles move away from each other , the air becomes less dense and lighter in weight.

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