Question

Define latent heat of vapourisation and fusion
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Answer 1

Answer:

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Explanation:

The process of melting,that is change of solid state into liquid state is known as fusion..You must have observed during the experiment of melting,that the temperature of the system does not change after the melting point is reached, till all the ice melts.This happens even though we continue to heat the beaker,that is,we continue to supply heat.This heat gets used up in changing the state by overcoming the forces of attraction between the particles. As this heat energy is absorbed by ice without showing any rise in temperature,it is considered that it gets hidden into the contents of the beaker and is known as the latent heat.The word latent means hidden.The amount of heat energy required to change 1kg  of a solid into liquid at atmospheric pressure at its melting point is known as latent heat of fusion..Do it in the same way as we have defined the latent heat of fusion.Particles in steam,that is,water vapour at 313 Kelvin (100°C) have more energy than water at same temperature.This is because particles in steam have absorbed extra energy in the form of latent heat of vaporisation..So the clear definition of latent heat of vaporisation is that the amount of heat energy required to change 1kg of a liquid to gas at atmospheric pressure at its boiling point is called latent heat of vaporisation

Answer 2

Answer:

Latent heat of vapourisation is heat required to break 1 kg of water molecule into gas particles

Explanation:

Actually it is heat required to break down particles of water molecules into steam particles. After boiling water temperature remains 100 c before converting into gas during this period , water molecules are broken by latent heat into many tiny partcles

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