BOYLE'S LAW
SQUEEZE THE GAS · PRESSURE RISES
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Gas in a Cylinder
0
1
2
3
4
5
P (atm)
V (L)
P
1
2
3
4
V
=
volume
P
=
pressure
P×V =
always constant
1. Boyle's Law
At constant temperature
P ∝ 1 / V
P₁V₁ = P₂V₂
2. Example
P₁ = 1 atm, V₁ = 4 L, V₂ = 1 L → P₂ = ?
P₂ = P₁V₁ / V₂ = (1 × 4) / 1 = 4 atm
3. Remember
Volume halved → pressure doubled
Push the syringe → pressure increases
MATRIC CHEMISTRY · GASES · PUNJAB BOARDS
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