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Latent Heat of Vaporisation

why the tempe...

Question

why the temperature does not rise,when the water starts boiling when heat is constanly supplied?

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Solution

The heat energy is used as latent heat. That is, the heat is used to break the forces of attraction between water molecules and convert it into gaseous state (Steam).

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Once the boiling starts, why does the temperature not rise accordingly even when heat is supplied?

Q. When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :
(a) rises very slowly
(b) rises rapidly until steam is produced
(c) first rises and then becomes constant
(d) does not rise at all

Q. Why does the temperature remain constant during the boiling of water even though heat is supplied continuously ?

Q. Why does steam rise from the cooking pot when I turn off the heat after the water starts boiling?

Why does latent heat not change the temperature of the thermometer when water is boiling at $100^{0} C$ ?

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Latent Heat of Vaporisation

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