Question

The molality of an aqueous dilute solution containg non-volatile solute is $0.1$m. What is the boiling temperature ( in ${}^{o}C$) of solution? (Boiling point elevation constant, $K_b=0.52kgmo{l}^{-1}K$; boiling temperature of water $={100}^{o}C$.

• A. $100.0052$
• B. $100.052$
• C. $100.0$
• D. $100.52$

Answer 1

The correct option is B $100.052$

$\Delta T_b=K_b.m$

$T_b^o-T_b=K_b.m$

$T_b^o-100=0.52\times 0.1$

$T_b^o=100.052{}^{o}C$