Respuesta :
Answer: Option (c) is the correct answer.
Explanation:
Latent heat is defined as the amount of heat required by per mole of a substance in order to change its state.
And, latent heat of freezing (fusion) is defined as the energy required for the phase change between a liquid and a solid without any change in their temperature.
Latent heat of freezing of pure water is [tex]0^{o}C[/tex] or -80 cal/g. Basically, the negative sign indicates heat is being released.
The amount of energy released by per mole of a substance when it changes its phase from solid to liquid is known as latent heat of melting.
For example, latent heat of melting of pure water is 80 cal/g.
thus, we can conclude that owing to the intermolecular interactions of water molecules (in a pure water), the latent heat of freezing (fusion) is 80 cal/g and the latent heat of melting is 80 cal/g.
