GASES CONSIST OF LARGE NUMBERS OF PARTICLES THAT ARE FAR APART RELATIVE TO THEIR SIZE.

COLLISIONS BETWEEN GAS PARTICLES ARE ELASTIC COLLISIONS.

GAS PARTICLES ARE IN CONSTANT, RAPID, RANDOM MOTION. THEY THEREFORE POSSESS KINETIC ENERGY.

THERE ARE NO FORCES OF ATTRACTION OR REPULSION BETWEEN GAS PARTICLES.

THE AVERAGE KINETIC ENERGY OF GAS PARTICLES DEPENDS ON THE TEMPERATURE.