Calculates the boiling point elevation of a solution from molal concentration and the ebullioscopic constant K_b: ΔT_b = K_b × m × i. Water's K_b = 0.512 °C·kg/mol — 1 mol/kg NaCl (i = 2) raises the boiling point by 1.024 °C; this is used to calculate molecular weights of unknown solutes.
Inputs
Solute Mass G
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Solvent Mass G
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Molar Mass G Mol
Mass of one mole of the substance (g/mol). Found by summing atomic weights. Converts between grams and moles.
Kb C Kg Mol
Reference formula or conversion factor shown for context.
Vant Hoff I
A multiplier applied in the calculation.
Results
boiling point elevation ΔTb (°C)
The value at the specified point or condition.
molality (mol/kg)
Reference formula or conversion factor shown for context.
new boiling point (water + ΔT)
The value at the specified point or condition.
ΔTb = i·Kb·m
Reference formula or conversion factor shown for context.