Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion

By
(a) Conversion of solid to vapour is
called sublimation. Name the term used to denote the conversion of vapour to solid. 

(b) Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion? 

Answer: (a) The conversion of vapour to solid without changing into liquid is known as ‘sublimation’. This process is also known as ‘deposition’. 

(b) Latent heat of fusion is the heat required to melt the solid state to liquid state without increase in temperature.

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