Task: Text Categorization
Input (English): Along with the Gibbs-Kelvin relation, this relation appears as a b over R cubed term in the Kohler equation that relates saturation in cloud condensation nuclei. The first practical application of it was determining molecular weights of compounds through a differential thermometer developed by Ernst Beckmann. This law is applicable over large ranges for ideal systems like toluene/xylene, but otherwise requires the limiting condition of low solute concentrations. Similar to a law stating that the pressure of a gas is proportional to the concentration of a gas, for 10 points, name this law which states that the vapor pressure of a solvent is proportional to the mole fraction of a solute.
Output (English): Science