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4. Asha was making tea in akehule. 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
Answers
Answer: The temperature of the steam is more than of the boiling water
Explanation:
The steam contains latent heat ( hidden heat ). This heat is the energy used up during the change of state of matter. Since it has more energy, it naturally has more temperature. Hence, the steam can also cause more severe burns.
Explanation:
The temperature of both boiling water and steam is 100°C, but steam gives out more heat (due to latent heat of vaporisation) in comparison to boiling water.
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.
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