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Heat

explain kinet...

Question

explain kinetic energy and latent heat of vapourization

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Solution

Energy of motion is called kinetic energy and is the energy possessed by the moving particles.
Latent heat of vaporisation is the energy needed to convert 1 kg of liquid water to its vapour at a given pressure (atmospheric pressure) .

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Q. What is latent heat of fusion or latent heat of vapourization?

The specific latent heat of vapourization of water is _______ .

Q. Statement: Water vapour causes more burning sensation than boiling water at the same temperature.
Reason: Water vapour has more energy than boiling water due to the latent heat of vaporization.

Q. Assertion :At equilibrium of

L i q u i d ⇌ V a p o u r

, kinetic energy of liquid phase and vapour phase is same. Reason: Kinetic energy of liquid or vapour is given by

\frac{3}{2} R T

Choose the correct option.

0^{o} C

falls from a height of

1 k m

on an insulated surface and its whole kinetic energy is converted into heat. What fraction of it will melt ?

(Latent heat of fusion of hail =

330 \times 10^{3} J / k g

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