• An ideal gas is one that follows the gas laws at all conditions of temperature and pressure.
  • A real gas is a gas that does not behave according to the assumptions of the kinetic-molecular theory.
  • Real gases deviate from ideal gases at high pressures and at low temperatures.
  • Gases are most ideal at high temperature and low pressure.
  • The ideality of a gas also depends on the strength and type of attractive forces that exist between the particles.
  • neon is more ideal than water vapor because neon’s atoms are only attracted by weak dispersion forces.
  • Helium is a more ideal gas than neon because its smaller number of electrons means that helium's dispersion Forces are even weaker than those of neon.
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