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Gases
Ideal Gas Density
Enter values in the stated units. Example inputs are provided to help you explore the method.
Results
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Method & assumptions
- Ideal gas relation p = ρRT gives density ρ = p/(RT). Specific volume is 1/ρ.
- Pressure must be absolute and temperature must be in kelvins. R is the mass-based gas constant for the gas or mixture, not the universal molar constant.
- Example: 101325 Pa, 300 K and R = 287 J/(kg·K) gives approximately 1.17683 kg/m³. The example R is a rounded dry-air assumption.
- This is an ideal-gas estimate. Dense gases, conditions near condensation or the critical point, and mixtures with changing composition require appropriate real-fluid property data.
- Source: https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/equation-of-state/