The Ideal Gas Law in Thermodynamics establishes a fundamental equation of state describing the macroscopic behavior of gases under conditions where intermolecular forces and molecular volume are negligible. Formally defined by the relationship $PV = nRT$, this law integrates pressure, volume, temperature, and amount of substance as exact mathematical variables within classical thermodynamics. It serves as a cornerstone for understanding idealized gas systems, providing the theoretical baseline against which real gas deviations and other specific gas laws are measured in physical chemistry and physics.
Prerequisite chain context: requires Standard Molar Volume Calculation at STP Conditions.