This document discusses three gas laws: Boyle's law states that for a fixed mass and temperature of a gas, the volume decreases as pressure increases; Gay-Lussac's law states that for a fixed mass and pressure, the volume of a gas increases as temperature increases; and the combined gas law states that for a fixed mass and volume, the pressure of a gas increases as temperature increases.

1. The
properties
of gases

2. Boyle-Mariotte law
For the same mass and temperature:
Volume decreases when pressure increases
P1V1 = P2V2
P
(Pa)
V (l)

3. Gay Lussac - Charles
For the same mass and pressure:
Volume increases with temperature
V1 V2
V
(l)
T (K)
T1 T2
=

4. Gay Lussac - Charles
For the same mass and volume:
Pressure increases with temperature
P1 P2
T1 T2
=
V
(l)
T (K)