Question

give reason :
on boiling water, steam is evolved​

Answer 1

Answer:

because the water get over heated and the air wants to escape from it

Explanation:

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Answer 2

When water is heated it evaporates, which means it turns into water vapor and expands. At 100℃ it boils, thus rapidly evaporating. And at boiling point, the invisible gas of steam is created. The opposite of evaporation is condensation, which is when water vapor condenses back into tiny droplets of water.