Combined Gas Law (PV/T)Chemistry
Combined Gas Law Calculator (P1V1/T1 = P2V2/T2 & STP Conversion)
Calculate final gas volume (V2), pressure, or temperature when all three thermodynamic state variables change simultaneously, including standard STP conversion.
Calculated Result
Final Gas Volume (V2)
2.5L
Calculator Inputs
Quick select:
Quick select:
Quick select:
Quick select:
Quick select:
Final Gas Volume (V2)
2.5L
Equivalent Volume at STP
5.5 L
Volume Expansion Ratio
0.5 -
Three-Dimensional State Equilibrium: Simultaneously resolves pressure, temperature, and volume transitions with rigorous thermodynamic accuracy.
Gas Volume Comparison Profile
Initial Volume V1
5 L(38%)
Final Volume V2
2.5 L(19%)
STP Volume
5.5 L(42%)
Standard physical chemistry tool uniting Boyle's, Charles's, and Gay-Lussac's laws for fixed gas masses.
Calculation Methodology
Combined Gas Law: (P1 * V1) / T1 = (P2 * V2) / T2. Temperatures must strictly be in Kelvin (K = °C + 273.15). Final Volume V2 = (P1 * V1 * T2) / (P2 * T1).
Frequently Asked Questions
The quantity of gas (number of moles or mass) must remain strictly constant in a leak-free closed container system.
Related Calculators
Recommended tools and calculators tailored to your current calculation
Chemistry
Van der Waals Real Gas Equation & Compressibility Factor (Z) Calculator
Chemistry
Gay-Lussac's Law Gas Pressure & Temperature Calculator (P1/T1 = P2/T2)
Chemistry
Boyle's Law Gas Pressure & Volume Calculator (P1V1 = P2V2)
Chemistry
Charles's Law Gas Volume & Temperature Calculator (V1/T1 = V2/T2)
Chemistry
Graham's Law of Effusion & Diffusion Velocity Calculator
Chemistry
Gibbs Free Energy & Reaction Spontaneity Calculator (ΔG = ΔH - TΔS)
Chemistry
Standard Enthalpy of Reaction & Hess's Law Calculator (ΔH°rxn)
Chemistry