K/molal\text{K/molal}

kelvin per molal

Molal constantexact by definition

The kelvin per molal is exactly equal to K·kg/mol, since a molal is a mole per kilogram of solvent and dividing by it restores the kilogram to the numerator. It is how textbooks usually write cryoscopic and ebullioscopic constants: water's freezing point depression constant is 1.86 K/molal.

Watch out: Written K/m in most textbooks, where m means molal and not metre. The catalog spells out "molal" because a symbol reading K/m in a unit list would be read as kelvin per metre by anyone who did not already know.

1 K/molal\text{K/molal} 1 K⋅kg/mol\text{K}{\cdot}\text{kg/mol}

One kelvin per molal in every molal constant unit

1,000kelvin kilogram per kilomole (K·kg/kmol)
1kelvin kilogram per mole (K·kg/mol)
1Celsius kilogram per mole (°C·kg/mol)
1kelvin per molal (K/molal)this unit
1Celsius degree per molal (°C/molal)