i need help in thermodynamics?

Question

whn a solid melt on constant pressure the vollume of thr resulting liqudi does nt differ much from the volume of solid using the 1st law of thermodynamics and the latent heat of fusion describe how the internal energy of the liquid compares to the internal energy of solid.???

Answer 1

Turning a lump of solid at its melting point into liquid at the same temperature requires an energy input to overcome the attractive force between adjacent atoms or molecules in the crystal lattice; the latent heat of fusion. So the internal energy of the liquid is greater than that of the solid.