18. During the change of state from liquid to gaseous. The temperature of the system remains
constant till the entire amount of liquid is converted into vapours even though heat is
continuously being supplied. This heat is actually used up in overcoming the forces of
attraction between the particles of a liquid.
Read the above passage and answer the following questions:
(a) Define latent heat of vaporisation.
(b) What produces more severe burns, boiling water or steam?
(c) What is the usefulness of latent heat of vaporisation ?
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