Temperature and Pressure - Online calculator, figures and tables showing density and specific weight of helium, He, at varying temperature and pressure - Imperial and SI Units. Helium - Density and Specific Weight vs.Gases - Densities - Densities and molecular weights of common gases like acetylene, air, methane, nitrogen, oxygen and others.Gas Mixtures - Properties - Gas mixtures and the ideal gas law, mass calculations, the individual gas constant and density.Ethylene - Thermophysical Properties - Chemical, physical and thermal properties of ethylene, also called ethene, acetene and olefiant gas.Ethane - Thermophysical Properties - Chemical, Physical and Thermal Properties of Ethane - C 2H 6.Cryogenic Fluids and Liquefied Gas Properties - Cryogenic properties as density, boiling points and heat of evaporation for fluids like hydrogen, methane, oxygen, nitrogen, fluorine and helium.Critical Temperatures and Pressures for some Common Substances - Critical temperatures and pressures for some common substances like air, alcohol, ether, oxygen and more.Critical Points for some Substances - Critical points of some common substances like air, argon, helium and more.Carbon Dioxide - Liquid Properties - Properties of saturated liquid Carbon Dioxide - CO 2 - density, specific heat, kinematic viscosity, thermal conductivity and Prandtl number.Benzene - Thermophysical properties - Chemical, physical and thermal properties of benzene, also called benzol.Air - Thermophysical Properties - Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more.Acetone - Thermophysical Properties - Chemical, physical and thermal properties of acetone, also called 2-propanone, dimethyl ketone and pyroacetic acid.Material Properties - Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.See also more about atmospheric pressure, and STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure,Īs well as Thermophysical properties of: Acetone, Acetylene, Air, Ammonia, Argon, Benzene, Butane, Carbon dioxide, Carbon monoxide, Ethane, Ethanol, Ethylene, Hydrogen, Hydrogen sulfide, Methane, Methanol, Nitrogen, Oxygen, Pentane, Propane, Toluene, Water and Heavy water, D 2O. Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg)įollow the links below to get values for the listed properties of helium at varying pressure and temperature: Thermal Conductivity ( Btu/hr ft oF, W/m oC)īoiling Point - saturation pressure 14.7 psia and 760 mm Hg - ( oF, oK) Gas constant - R - ( ft lb/lb oR, J/kg oC) Specific Heat - c p - ( Btu/lb oF or cal/g oC, J/kgK) Density of liquid at atmospheric pressure ( lb/ft 3, kg/m 3)Ībsolute Viscosity ( lb m/ft s, centipoises)
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