Question

a. What is meant by latent heat? How will the state of matter transform if latent heat is given off?​

Answer 1

Question:-

• What is meant by latent heat? How will the state of matter transform if latent heat is given off?

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$\underline{\sf \large{Solution-}}$

Latent heat of a body is the amount of heat required to change the state of unit mass of the body from solid to liquid or from liquid to gas without any change in temperature. If latent heat is given off, then the body in liquid state will transform to solid state and the body in vapour state will transform to liquid state. This means the internal energy of the matter decreases when latent heat is given off.

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Answer 2

Latent heat is the energy released or energy absorbed by a body during a constant-temperature process ( Isothermal process).

• Latent heat can be understood as energy in a hidden form that is supplied or extracted to change the state of a substance without changing its temperature.

• consider an example of transformation from water to ice.

• The specific latent heat of fusion (when a solid change to liquid) of ice is the amount of heat required to change 1 kg of ice to water without a temperature change. The specific latent heat of fusion of ice is 0.336 MJ per kg.