noun
ideal gas; perfect gas
Technical term in physics and chemistry for a hypothetical gas that perfectly follows the ideal gas law. Contrasts with 実在気体 (real gas).
See also: 実在気体
理想気体の状態方程式はPV=nRTで表される。
The equation of state for an ideal gas is expressed as PV=nRT.
高温・低圧の条件下では、実在気体も理想気体に近い振る舞いをする。
Under high-temperature and low-pressure conditions, real gases also behave nearly like an ideal gas.