How to Calculate Combined Gas Law
What is Combined Gas Law?
The combined gas law merges Boyle's, Charles's, and Gay-Lussac's laws into one relationship: P₁V₁/T₁ = P₂V₂/T₂. It allows calculation of any one variable when all others change simultaneously.
Step-by-Step Guide
- 1Convert temperatures to Kelvin
- 2Identify all five known values (P1, V1, T1, and two of P2/V2/T2)
- 3Rearrange the equation to solve for the unknown
- 4Check units are consistent throughout
Worked Examples
Input
P1=101kPa V1=10L T1=300K · P2=202kPa T2=400K
Result
V2 = 6.6L
(101×10×400)/(300×202)=6.62L
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