ideal gas

This term refers to a simplified mathematical model used in physics and chemistry to predict the behavior of real gases. It assumes that the gas particles have no volume and exert no intermolecular forces on one another, making it a theoretical benchmark rather than a substance found in nature.

In practical application, real gases behave most like an ideal gas at high temperatures and low pressures. When these conditions are not met, the ideal gas law becomes inaccurate, requiring corrections such as the van der Waals equation to account for particle volume and attraction.