Question

what is latent heat of vaporisation? class 9,ncert matter

Answer 1

latent heat of vaporisation is the amount of heat to required to change 1kg of liquid into gas.

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Answer 2

Answer:

The heat energy required to change 1 kg of liquid to the gaseous state at atmospheric pressure at its boiling point is known as latent heat if vaporisation.

Know more:

※ The temperature at which a liquid boils at atmospheric pressure is called it's boiling point.

※ The latent heat of vaporisation of water is 22.59 × 10^5 J/kg or 540 kcal/kg.

※ It means, at 100°C, both water and steam exist together. But, the particles of steam at 100°C have more energy as compared to the particles of water at the same temperature since during change of state from water to steam, heat energy equal to latent heat of vaporization has been absorbed.

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