what is latent heat of fusion?
Answers
latent) heat of fusion, is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure.
The amount of heat gained by a solid object to convert it into a liquid without any further increase in the temperature is known as latent heat of fusion.
If m kg of solid changes to liquid at constant temperature which is its melting point, the heat absorbed by the substance or the latent heat of fusion formula is given by,
Q = m L
Wherein,
L = specific latent heat of fusion of substance.
If the temperature of the object varies from the lower temperature t1 to higher temperature t2, the heat gained or liberated by the material is given by,
Q = mc Δt
= mc (t2 – t1)
Therefore, the total heat gained or released by the substance will be,
Q = mL + mc Δt