1.

Latent heat of fusion of ice is "1436.3 cal mol"^(-1). Calculate the molal depression constant of water.

Answer»

Solution :`K_(f)=(M_(1)RT_(0)^(2))/(1000Delta_("FUS")H)=("18 GMOL"^(-1)XX"2 cal K"^(-1)"mol"^(-1)xx(273 K)^(2))/("1000 g kg"^(-1)xx"1436.3 cal mol"^(-1))`
`="1.87 K kg mol"^(-1)`


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