Answer :
Answer:
Final boiling point of water is 376·06 K
Explanation:
As NaCl is a non-volatile solute so by the addition of non-volatile solute to a pure solvent will increase its boiling point
Formula for the change in boiling point of the solution is
ΔT[tex]x_{b}[/tex] = i × K[tex]x_{b}[/tex] × m
where
ΔT[tex]x_{b}[/tex] is the change in boiling point of the solution
i is the vant Hoff factor which is the number of particles per single molecule of the solute
K[tex]x_{b}[/tex] is the cryoscopic constant which only depends on the properties of the solvent and not on the solute
m is the molality of the solute
in this case molality of the NaCl is 3÷1 =3 mole/kg
By the formula
ΔT[tex]x_{b}[/tex] = 2×0·51×3=3·06 K
Boiling point of the pure solvent( in this case it is water) is 373 K
Final boiling point of the water = ΔT[tex]x_{b}[/tex] + 373
= 3·06+373
∴ Final boiling point of the water = 376·06 K