1.

For a dilute solution having molality m of of a given solute in a solvent of mol.wt.M,b.pt. T_(b) and heat of vaporisation per mole DeltaH:[(aT_(b)/(am)]_(mrarr0) is equal to :

Answer»

Molal elevation constant of SOLVENT
`(RT_(b)^(2)M)/(DeltaH_("vap")), where `M` in `kg DeltaH_("vap")` and `R` in `J` mol`^(-1)`
`(RT_(b)^(2)M)/(DeltaS_("vap")), where `M` in `kg, DeltaS_("vap")` and `R` in `J` mol`^(-1)`
`(RT_(B^(2)M))/(1000DeltaH_("vap"))`, where `M` in `g, R` and `DeltaH_("vap")` expressed in same unit of heat.

SOLUTION :`DeltaT_(b)=mK_(b)i ,K_(b)=(RT^(2))/(1000DeltaH_("vapour"))`


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