(a)What do you understand by the change of phase of substance?
(a)What do you understand by the change of phase of substance?

(b)Is there any change in temperature during the change of phase?

(c)Does the substance absorb or liberate any heat during the change of phase?

(d) What is the name given to the energy absorbed during a phase change?

Solution:

(a) At a constant temperature, phase change is the transition from one state to another.
(b) No, there is no temperature change as a result of the phase transition.
(c) During the phase change, the substance absorbs or releases heat.
(d) Latent heat is the designation given to the energy absorbed during a phase change.