Q1
What does Boyle's Law state?
APressure and volume are inversely proportional at constant temperature
BPressure and volume are directly proportional
CVolume and temperature are inversely proportional
DNo relationship exists
ICSEClass 9 (ICSE)ChemistryCh 7 · Topic 2
Practice and Revision - Gas Laws
Let us practise and revise what we learned about gas laws. Gas laws describe the relationships between pressure, volume, and temperature of
Core concept
Boyle's Law states that at constant temperature, pressure and volume of a gas are inversely proportional (P₁V₁ = P₂V₂).
How it works
Charles's Law states that at constant pressure, volume and temperature of a gas are directly proportional (V₁/T₁ = V₂/T₂).
Why it matters
The combined gas law merges these relationships, showing how pressure, volume, and temperature relate together for a fixed amount of gas.
Key detail
Understanding gas laws helps explain everyday phenomena, like why a balloon expands when heated, or why tyres need adjusted pressure in different weather.
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Quick notes
• Boyle's Law: P1V1 = P2V2 (constant temperature).
• Pressure and volume are inversely proportional.
• Charles's Law: V1/T1 = V2/T2 (constant pressure).
• Volume and temperature are directly proportional.
• Combined gas law merges these relationships.
• It applies to a fixed amount of gas.
• This explains balloon expansion when heated.
• It also explains tyre pressure changes with weather.