Molal elevation constant is the elevation in boiling point produced by
Molal elevation constant is the elevation in boiling point produced by
1 mole of solute in one litre of solvent
$1 \mathrm{~g}$ of solute in $100 \mathrm{~g}$ of solvent
$100 \mathrm{~g}$ of solute in $1000 \mathrm{~g}$ of solvent
1 mole of solute in one Kg of solvent
Solution
The molal elevation constant $(\mathbf{K b})$ is defined as the elevation in boiling point of a solvent when 1 mole of a non-volatile solute is dissolved in 1 kg of the solvent. It is used in the equation:
$\Delta T_b=K_b \cdot m$
where $\Delta T_b$ is the elevation in boiling point, $K_b$ is the molal elevation constant, and $m$ is the molality of the solution (moles of solute per kilogram of solvent).