Question

2. When heat is being supplied to a solid, then what does the heat energy do to the particles of solid?
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Answer 1

$\huge{\bold{\underline{Answer}}}$

Solid-

▪It has minimum molecular space.

▪It has maximum force of attraction.

$\implies$ When heat is being supplied to a solid, then the heat energy is used to break the force of attraction between the particles of solid. We cannot see this energy from outside as it is absorbed by the particles of solid.

$\implies$ This is called $\bold{hidden\ heat}$ or $\bold{latent\ heat}$

$\implies$ It is called hidden heat because the energy is hidden inside the particles and we are unable to see that heat.

$\bold{\underline{Latent\ heat\ of\ fusion}}$

$\implies$ $\bold{Latent\ heat\ of\ fusion}$ is known when 1 kg of solid is converted to 1 kg of liquid without any change in it temperature is known as $\bold{latent\ heat\ of\ fusion}$ or $\bold{hidden\ heat.}$