**Chapter 12 Gases and Their Properties Key Terms**

pressure

torr

atm

pascal

bar

psi

Boyle's law

Charles' law

Kelvin

law of combining volumes

Avogadro's law

Ideal gas law

R, gas constant

gas density

standard temperature and pressure

partial pressure

mole fraction

Dalton's law

kinetic molecular theory

rms speed

Boltzmann distribution diffusion

effusion

Graham's law

van der Waals' equation of state

real gases