Physics
(a) What do you understand by the change of phase of a 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?
Calorimetry
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Answer
(a) The process of change from one state to another at a constant temperature is called the change of phase.
(b) No, there is no change in temperature during the change of phase.
(c) Yes, the substance absorb or liberates heat during the change of phase. The heat is absorbed during melting and it is liberated during freezing at a constant temperature.
(d) The name given to the energy absorbed during a phase change is latent heat.
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