Question

When water is cooled to a temperature x, it gets converted into ice at temperature x by a process called P. And when ice at temperature x is warmed, it gets reconverted into water at the same
temperature x in a process called Q.
(a) What is the value of temperature x in Kelvin ?
(b) What is the process P known as?
(c) What is the name of energy released during process P? (d) What is the process Q known as?
(e) What is the name of energy absorbed during process Q?

Answer 1

Answer:

i) x is waters freezing point or 0°C . Its value in kelvin is 273 K.

b) Process P is called freezing.

c) Name of energy released is called heat energy or thermal energy. Actually to be more precise it is the latent heat of freezing of ice. If I remember correctly it is 3.34 × 10⁵ Joules of heat energy that's given out.

d) Process Q is called Melting or fusion.

e) Name of energy absorbed during fusion or Melting is the latent heat of fusion of ice . Its 3.34 × 10⁵ Joules of heat.

Explanation:

Latent heat of fusion and freezing are same as they are opposite to each other. When freezing the same latent heat is given out. and when Melting the same latent heat is taken in.