Combined Gas Law (P₁V₁/T₁ = P₂V₂/T₂)
When n is constant, all of P, V, T can change. Solve for any one.
Result
V2
5.0000
Combined gas law.
- P₁V₁/T₁1.666667
- P₁100
- V₁5
- T₁300 K
- P₂200.0000
- V₂5.0000
- T₂600.0000 K
- P₂V₂/T₂1.666667
Step-by-step
- P₁V₁/T₁ = 1.6667.
- Solve for V2 from P₂V₂/T₂ = 1.6667.
How to use this calculator
- Enter the 5 known values + pick which to solve.
- Read result.
About this calculator
Combined gas law: P₁V₁/T₁ = P₂V₂/T₂ for fixed amount of gas. Combines Boyle, Charles, and Gay-Lussac into one. Useful when all three properties change. Hot air balloon rising into colder, lower-pressure air: V grows (T drops slower than P drops). T must be in Kelvin.
Frequently asked
Combined: same gas, two states. Ideal: absolute formula PV = nRT. Use combined when transforming between conditions; ideal when finding absolute properties.
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