Sunday, October 3, 2010

Properties of Perfect Gases

          A perfect gas may be defined as a state of a substance, whose evaporation from its liquid state is complete, and strictly obeys all the gas laws under all conditions of temperature and pressure. In actual practice, there is no real or actual gas which are ordinary difficult to liquefy, such as oxygen, nitrogen, hydrogen and air, within certain temperature and pressure limits, may be regarded as perfect gases.