Task: Text Categorization
Input (English): 21 (Tiebreaker). This law applies when the compressibility factor is equal to 1. It is expressed in the first term of the virial equation, and it is most accurate at high temperatures and low pressures. Deviations from it due to particle volume and intermolecular forces are accounted for in the(*) van der Waals equation, and its namesake entities are described by kinetic theory. This law's namesake constant is equal to Avogadro's number times Boltzmann's constant. For 10 points, name this law most commonly expressed as P V equals N R T.
Output (English): Science