What is latent heat of vapourisation?

What is latent heat of vaporization ?

Calculate the entropy change for vapourisation of water if latent heat of vapourisation for water is 540 cal/g. ( K_(b) for water =0.51 K. kg "mole"^(-1) )

Calculate the entropy change for vapourisation of water if latent heat of vapourisation for water is 540 cal/g. ( K_(b) for water =0.51 K. kg "mole"^(-1) )

Why is latent heat of vaporisation much larger than latent heat of fusion?

Calculated the entropy change for Vapourisation of water if latent if latent heat of vapourrisation for water is 540"col"//g K_(b)(H_(2)O)=0.51K//"molality" .

Why the value of latent heat of vapourisation is greater than the latent heat of melting.