Gas Mixtures - Properties
Calculate properties of gas mixtures including mass, individual gas constant, and density using the ideal gas law adapted for gas mixtures.
Gas Mixtures - Properties
Mixture of gases are common in many applications such as air (nitrogen, oxygen, and water vapor) and combustion gases (nitrogen, water vapor, and carbon dioxide).
The Ideal Gas Law for a Gas Mixture
p V = mm Rm T
Where:
- p = absolute pressure in the mixture (N/m², lb/ft²)
- V = volume of the mixture (m³, ft³)
- mm = mass of the mixture (kg, lb)
- Rm = individual gas constant for the mixture (J/kg K, ft lb/slugs oR)
- T = absolute temperature in the mixture (K, °R)
Key Formulas
Mass of Gas Mixture: mm = m₁ + m₂ + ... + mₙ
Individual Gas Constant of Gas Mixture: Rm = (R₁m₁ + R₂m₂ + ... + Rₙmₙ) / (m₁ + m₂ + ... + mₙ)
Density of Gas Mixture: ρm = (ρ₁v₁ + ρ₂v₂ + ... + ρₙvₙ) / (v₁ + v₂ + ... + vₙ)
Where:
- ρm = density of the gas mixture (kg/m³, lb/ft³)
- ρ₁...ρₙ = density of each component (kg/m³, lb/ft³)
- v₁ + v₂ + ... + vₙ = volume share of each component (m³, ft³)