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Answers
Answer:
Energy is required to change the phase of a substance, such as the energy to break the bonds between molecules in a block of ice so it may melt.
During a phase change energy my be added or subtracted from a system, but the temperature will not change. The temperature will change only when the phase change has completed.
The heat Q required to change the phase of a sample of mass m is given by
Q
=
mL
f
(melting or freezing) and
Q
=
mL
v
(evaporating or condensing), where Lf and Lv are the latent heat of fusion and the latent heat of vaporization, respectively.
Answer:
the added heat is used to overcome remaining forces that hold the molecules together with in the liquid. This allows the molecules to move even a further a part and form a gas. Once again , the heat energy during the phase change is stored as potential energy
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