Summary:
- 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.