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GAS LAWS
MAIN GAS LAWS
• Boyle’s Law• Charles’ Law• Gay-Lussac’s Law
Law Boyle’s Charles’ Gay-Lussac’s
Constant
Trend
Relationship
BOYLE’S LAW
BOYLE’S LAW
• At constant temperature • The gas particle in the
cylinder apply pressure on to the cylinder.• By colliding with
container walls
BOYLE’S LAW
• The volume of the cylinder increases, so the gas particles in the cylinder have more space to move
• Particles collide less often, with each other or with the walls of the container
BOYLE’S LAW
• …and thus the pressure of the gas decreases!
• As volume increases, pressure decreases
Law Boyle’s Charles’ Gay-Lussac’s
Constant
Trend
Relationship
Temperature
As P ↑, V ↓
As P ↓, V ↑
INDIRECT
CHARLES’ LAW
CHARLES’ LAW
• At constant pressure• Gas particles move
inside a balloon and collide with the sides, creating the volume of the balloon
CHARLES’ LAW
• As the temperature increases, the kinetic energy of the gas also increases.
• The gas molecules collide with the sides more frequently and with greater force.
CHARLES’ LAW
• …thus the volume of the balloon will also increase
• As temperature increases, volume increases
Law Boyle’s Charles’ Gay-Lussac’s
Constant
Trend
Relationship
Temperature Pressure
As P ↑, V ↓
As P ↓, V ↑
As V ↑, T ↑
As V ↓, T ↓
INDIRECT DIRECT
GAY-LUSSAC’S LAW
GAY-LUSSAC’S LAW
• At constant volume• The piston is applying
pressure to the gas particles in the cylinder• Weights (in gray)
GAY-LUSSAC’S LAW
• When the gas in the cylinder is cooled, the particles move slower, applying less pressure to the sides of the container
GAY-LUSSAC’S LAW
• …thus the pressure of the gas in the container will decrease
• As temperature decreases, pressure decreases
Law Boyle’s Charles’ Gay-Lussac’s
Constant
Trend
Relationship
Temperature Pressure Volume
As P ↑, V ↓
As P ↓, V ↑
As V ↑, T ↑
As V ↓, T ↓
As P ↑, T ↑
As P ↓, T ↓
INDIRECT DIRECT DIRECT
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