Propane - Thermophysical properties (original) (raw)

Chemical, physical and thermal properties of propane gas - C3H8.

Phase diagram of propane

Chemical, physical and thermal properties of Propane - C3 H8 :
(values at 25 oC (77 oF, 298 K) and atmospheric pressure)

Propane - Thermophysical properties

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 ( lbm /ft s, centipoises ) 5.38 10-6, 0.0074
Sound velocity in gas ( m/s ) 253
Specific Heat - cp - ( Btu/lb oF or cal/g oC, J/kgK ) 0.39, 1630
Specific Heat Ratio - cp /cv 1.13
Gas constant - R - ( ft lb/lb o R, J/kg oC ) 35.0, 188
Thermal Conductivity ( Btu/hr ft oF, W/m oC ) 0.010, 0.017
Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - ( oF, oC ) -44, -42.2
Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg ) 184, 428000
Freezing or Melting Point at 1 atm ( oF, oC ) -309.8, -189.9
Latent Heat of Fusion ( Btu/lb, J/kg ) 19.1, 44400
Critical Temperature ( oF, 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.

Propane phase diagram

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.

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

Citation

This page can be cited as

Modify the access date according your visit.