Question

If a solid (say, a crystal of potash alum) is soluble in water, then how can we find its volume by displacement method?¿

Answer 1

The temperature of a substance remains constant at its melting and boiling

points untill all the substance melts or boils because, the heat supplied is

continuously used up in changing the state of the substance by overcoming

the forces of attraction between the particles. This heat energy absorbed

without showing any rise in temperature is given the name latent heat of

fusion/latent heat of vapourisation.