Assumes constant pressure (Charles law), assumes continuous motion (Kinetic molecular theory), direct relationship between variables (Charles law), involves three variables (combined gas law), explains basis of gas pressure (Boyle's law), inverse relationship between variables (Boyle's law), explains diffusion (Kinetic molecular theory), assumes constant temperature (Boyle's law).
Boyle's law states that the volume of a given mass of gas is inversely proportional to its pressure provided the temperature is constant.
Charles' law states that the volume of a given mass of a gas is directly proportional to its absolute temperature provided the pressure is constant..
The kinetic molecular theory explains the be behaviour of gases. This theory explains the constant motion of particles of matter.
The combined gas law involves pressure, volume and temperature of the gas.
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