Boyle's Law (P₁V₁ = P₂V₂)
Constant T, constant n: pressure × volume = constant.
Result
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How to use this calculator
- Enter P₁, V₁, P₂.
- Read V₂.
About this calculator
Boyle's Law (1662): for fixed n, T, gas pressure × volume is constant. Doubling pressure halves volume. Demonstrated with sealed syringe — push, pressure rises, volume drops. Relevant to scuba diving (air compresses going deep), cylinders + pneumatic systems, and deep-sea creatures (collapsible body cavities).
Frequently asked
Constant T critical?+
Yes — Boyle assumes isothermal. If T changes, use combined gas law.
Why does this work?+
Kinetic theory: smaller volume means molecules collide with walls more often → higher pressure.
Real-world?+
Diving (air compresses), spray cans (push gas to release product), inflatable structures.
Failure?+
High-pressure (>50 atm) or low-temp (near liquefaction). Real gases deviate.
Inversely proportional?+
P ∝ 1/V at constant T. PV = constant. Plot P vs. V: hyperbola.
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