Helium
Reference data and engineering information about helium for gases and compressed air applications.
helium
Overview
Engineering reference data for Helium in gases and compressed air.
Key Formulas
Ideal Gas Law
Pressure × Volume = moles × gas constant × temperature.
Boyle's Law
At constant temperature.
Charles's Law
At constant pressure.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Pressure | Pa | |
| Volume | m³ | |
| Temperature | K | |
| Gas constant | 8.314 J/(mol·K) |
Data Table
14 rows
col0 |
|---|
| Specific Gravity, air = 1 |
| Specific Volume (ft3/lb, m3/kg) |
| Density of liquid at atmospheric pressure (lb/ft3, kg/m3) |
| Absolute Viscosity (lbm/ft s, centipoises) |
| Sound velocity in gas (m/s) |
| Specific Heat - cp - (Btu/lb oF or cal/g oC, J/kgK) |
| Specific Heat Ratio - cp/cv |
| Gas constant - R - (ft lb/lb oR, J/kg oC) |
| Thermal Conductivity (Btu/hr ft oF, W/moC) |
| Boiling Point - saturation pressure 14.7 psia & 760 mm Hg - (oF,o K) |
| Latent Heat of Evaporation at boiling point (Btu/lb, J/kg) |
| Critical Temperature (oF,o K) |
| Critical Pressure (psia, MN/m2) |
| Critical Volume (ft3/lb, m3/kg) |
Source: engineeringtoolbox.com