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

NCERT Class IX
Sciences - Exemplar Problems

Chapter 1. Matter in our Surroundings

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2015-05-23T15:43:38+05:30

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The temperature of the steam is same as that of water boiling inside the kettle.

But the steam carries more heat, as it contains latent heat of vaporisation.  That is a lot of heat.  When the steam touches the body, it condenses, then the latent heat of vaporisation touches the body.


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