Question

Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment​

Answer 1

Answer:

It is because, when water changes into steam, it absorbs latent heat of vaporisation , but when steam condenses to form water, an equal amount of latent heat is given out without changing the temperature. Hence, she felt intense heat from puff of steam gushing out of the spout of the kettle.