(values at 25 oC (77 o F, 298 K) and atmospheric pressure)
Molecular Weight | 44.097 |
Specific Gravity of gas (air = 1) | 1.52 |
Specific Volume ( ft3 /lb, m3 /kg ) | 8.84, 0.552 |
Density of liquid at atmospheric pressure ( lb/ft3 , kg/m3 ) | 36.2, 580 |
Vapor pressure at 25 oC ( psia, MN/m2 ) | 135.7, 0.936 |
Absolute Viscosity ( lb m /ft s, centipoises ) | 5.38 10-6 , 0.0074 |
Sound velocity in gas ( m/s ) | 253 |
Specific Heat - c p - ( Btu/lb o F or cal/g oC, J/kgK ) | 0.39, 1630 |
Specific Heat Ratio - c p /c v | 1.13 |
Gas constant - R - ( ft lb/lb o R, J/kg oC ) | 35.0, 188 |
Thermal Conductivity ( Btu/hr ft o F, W/m oC ) | 0.010, 0.017 |
Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - ( o F, oC ) | -44, -42.2 |
Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg ) | 184, 428000 |
Freezing or Melting Point at 1 atm ( o F, oC ) | -309.8, -189.9 |
Latent Heat of Fusion ( Btu/lb, J/kg ) | 19.1, 44400 |
Critical Temperature ( o F, oC ) | 205, 96 |
Critical Pressure ( psia, MN/m2 ) | 618, 4.26 |
Critical Volume ( ft3 /lb, m3 /kg ) | 0.073, 0.0045 |
Flammable | yes |
Heat of combustion ( Btu/ft3 , Btu/lb, kJ/kg ) | 2450, 21660, 50340 |
See the following documents for changes in propane properties with changes in pressure and temperature :
See also more about atmospheric pressure , and STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure ,
as well as Thermophysical properties of: Acetone , Acetylene , Air , Ammonia , Argon , Benzene , Butane , Carbon dioxide , Carbon monoxide , Ethane , Ethanol , Ethylene , Helium , Hydrogen , Hydrogen sulfide , Methane , Methanol , Nitrogen , Oxygen , Pentane , Toluene , Water and Heavy water, D2O . Propane is a gas at standard conditions. However, at low temperature and/or high pressures the gas becomes a liquid (or a solid at very cold conditions).
The phase diagram for propane shows the phase behavior with changes in temperature and pressure. The curve between the critical point and the triple point shows the propane boiling point with changes in pressure. It also shows the saturation pressure with changes in temperature.
At the critical point there is no change of state when pressure is increased or if heat is added.
The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.
Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.
Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.
Chemical, physical and thermal properties of acetone, also called 2-propanone, dimethyl ketone and pyroacetic acid. Phase diagram included.
Adiabatic flame temperatures for hydrogen, methane, propane and octane - in Kelvin.
Chemical, physical and thermal properties of benzene, also called benzol. Phase diagram included.
Chemical, physical and thermal properties of n-Butane.
Heat of combustion (energy content) for som common substances - with examples how to calculate heat of combustion.
Heating fuels and their energy content.
Chemical, Physical and Thermal Properties of Ethane - C2H6.
Chemical, physical and thermal properties of ethylene, also called ethene, acetene and olefiant gas. Phase diagram included.
Adiabatic flame temperatures for common fuel gases - propane, butane, acetylene and more - in air or oxygen atmospheres.
Combustion heat values for gases like acetylene, blast furnace gas, ethane, biogas and more - Gross and Net values.
Higher and lower calorific values (heating values) for fuels like coke, oil, wood, hydrogen and others.
Autoignition points for fuels and chemicals like butane, coke, hydrogen, petroleum and more.
Flame and explosion limits for gases like propane, methane, butane, acetylene and more.
Gross heat and net heat values for gases like hydrogen, methane and more.
Vapor pressure vs. temperature for propane, n-butane, n-heptane and n-pentane hydrocarbons.
Absolute (dynamic) viscosity values for some common fluids.
Liquefied Petroleum - LP - gas properties.
Chemical, physical and thermal properties of pentane, also called n-pentane. Phase diagram included.
Online calculator, figures and tables showing density and specific weight of propane, C3H8, at temperatures ranging from -187 to 725 °C (-305 to 1300 °F) at atmospheric and higher pressure - Imperial and SI Units.
Online calculators, figures and tables showing dynamic and kinematic viscosity of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units.
Latent heat with vaporized propane.
Figures and tables with Prandtl Number of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units.
Online calculator, figures and tables showing thermal conductivity of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units.
Figures and tables showing thermal diffusivity of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units.
Vapor pressure vs. temperature.
Evaporation pressure of propane butane mixture vs. temperature.
Sizing low pressure propane gas pipe lines - Metric units.
Sizing of propane gas pipe lines with pressures above 5 psig (35 kPa).
Sizing of low pressure propane gas pipe lines - Imperial units.
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!
We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.
Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.
Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.
AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.
If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. You can target the Engineering ToolBox by using AdWords Managed Placements.