Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

Ethanol - Thermophysical properties

Sponsored Links

Ethanol (Ethyl Alcohol), C2H 5 OH, is a volatile, flammable , colorless liquid with a slight characteristic odor. It is produced via petrochemical processes or naturally by the fermentation of sugars by yeasts.

Ethanol is most commonly consumed as a popular recreational drug . It is a psychoactive substance and is the principal type of alcohol found in alcoholic drinks. It also has medical applications as an antiseptic and disinfectant. The compound is widely used as a chemical solvent, either for scientific chemical testing or in synthesis of other organic compounds. Ethanol is also used as a clean-burning fuel source.

The phase diagram of ethanol is shown below the table.

Chemical, physical and thermal properties of ethanol :
Values are given for liquid at 25 oC /77 o F / 298 K and 1 bara, if not other phase, temperature or pressure given.

For full table with Imperial Units - rotate the screen!

Ethanol - Thermophysical properties
Property Value Unit Value Unit Value Unit Value Unit
Acidity (pKa 1 ) 15.9
Autoignition temperature 636 K 363 °C 685 °F
Boiling Point 351.39 K 78.2 °C 172.8 °F
Critical density 5.91 mol/dm3 272 kg/m3 0.528 slug/ft3 17.0 lb/ft3
Critical Pressure 6.25 MPa=MN/m2 62.5 bara 61.7 atm 906 psia=lb f /in2
Critical temperature 513.9 K 240.8 °C 465.4 °F
Critical Volume 169 cm3 /mol 0.00367 m3 /kg 1.89 ft3 /slug 0.0588 ft3 /lb
Density (gas) at 0.08 bar 3.15 mol/m3 0.145 kg/m3 0.00028 slug/ft3 0.0091 lb/ft3
Density (liquid) 17046 mol/m3 785.3 kg/m3 1.524 slug/ft3 49.02 lb/ft3
Flammable (gas and liquid) yes
Flash point 286 K 13 °C 55 °F
Gas constant (individual) - R 180.5 J/kg K 0.05013 Wh/(kg K) 1079 [ft lbf/slug °R] 33.54 [ft lbf/lb °R]
Gibbs free energy of formation (gas) -168 kJ/mol -3647 kJ/kg -1568 Btu/lb
Specific heat capacity, Cp (isobaric) (gas) 74 J/mol K 1.60 kJ/kg K 0.383 Btu/lb°F or cal/g K
Specific heat capacity, Cp (liquid) 118 J/mol K 2.57 kJ/kg K 0.614 Btu/lb°F or cal/g K
Specific heat capacity, Cv (isochoric) (gas) 65 J/mol K 1.42 kJ/kg K 0.339 Btu/lb°F or cal/g K
Specific heat capacity, Cv (liquid) 100 J/mol K 2.18 kJ/kg K 0.520 Btu/lb°F or cal/g K
Heat (enthalpy) of combustion (gas) 1336.8 kJ/mol 29017 kJ/kg 12.5 Btu/lb
Heat (enthalpy) of formation (gas) -234 kJ/mol -5079 kJ/kg -2184 Btu/lb
Heat (enthalpy) of fusion at -173°F/-114°C 4.9 kJ/mol 106 kJ/kg 45.73 Btu/lb
Heat (enthalpy) of evaporation 42.32 kJ/mol 919 kJ/kg 394.94 Btu/lb
Ionization potential 10.47 eV
log K OW (Octanol/Water Partition Coefficient) -0.31
Melting point 159.01 K -114.1 °C -173.5 °F
Molecular Weight 46.069 g/mol 0.10156 lb/mol
Solubility in water 1000 mg/ml
Sound velocity in liquid 1139 m/s 3736 ft/s 2551 mi/h
Sound velocity in gas, at 0.08 bara 246 m/s 807 ft/s 551 mi/h
Specific Gravity (gas) (relativ to air) 1.59
Specific Gravity (liquid) (relativ to water) 0.79
Specific Heat Ratio (gas) - Cp/Cv 1.13
Specific Heat Ratio (liquid) - Cp/Cv 1.18
Specific Volume (gas), at 0.08 bar 0.318 m3 /mol 6.90 m3 /kg 3554 ft3 /slug 110 ft3 /lb
Specific Volume, (liquid) 0.0000587 m3 /mol 0.00127 m3 /kg 0.656 ft3 /slug 0.0204 ft3 /lb
Standard molar entropy , S° (gas) 283 J/mol K 6.14 kJ/kg K 1.47 Btu/lb °F
Standard molar entropy, S° (liquid) 160 J/mol K 3.47 kJ/kg K 0.83 Btu/lb °F
Surface tension 21.97 dynes/cm 0.02197 N/m
Thermal Conductivity 0.167 W/m K 0.0965 Btu/hr ft °F
Triple point pressure 4.3x10 -10 MPa=MN/m2 4.3x10 -9 bara 4.24x10 -9 atm 6.24x10 -8 psia=lb f /in2
Triple point temperature 150.00 K -123.15 °C -189.67 °F
Vapor (saturation) pressure 0.008 MPa=MN/m2 60.0 mm Hg 0.0790 atm 1.16 psi=lb f /in2
Viscosity , dynamic (absolute) 1.074 cP 721.7 [lb m /ft s*10-6 ] 22.43 [lb f s/ft2*10-6 ]
Viscosity , kinematic 1.36 cSt 14.6 [ft2/s*10-6 ]

Follow the links below to get values for the listed properties of ethanol at varying 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 , Ethylene , Helium , Hydrogen , Hydrogen sulfide , Methane , Methanol , Nitrogen , Oxygen , Pentane , Propane , Toluene , Water and Heavy water, D2O .

Ethanol is a liquid at standard conditions. However, at low temperature and/or very high pressures it becomes a solid.

The phase diagram for ethanol shows the phase behavior with changes in temperature and pressure. The curve between the critical point and the triple point shows the ethanol 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.

Sponsored Links

Related Topics

Boiling Points of Fluids

Boiling points of elements, products and chemical species at varying conditions.

Densities

Densities of solids, liquids and gases. Definitions and convertion calculators.

Fluid Mechanics

The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.

Material Properties

Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

Melting and Freezing Points

Melting and freezing points of elements and chemical species at varying conditions.

Thermodynamics

Work, heat and energy systems.

Viscosities

Viscosities of products and chemical species at varying conditions.

Related Documents

Acetone - Thermophysical Properties

Chemical, physical and thermal properties of acetone, also called 2-propanone, dimethyl ketone and pyroacetic acid. Phase diagram included.

Benzene - Thermophysical properties

Chemical, physical and thermal properties of benzene, also called benzol. Phase diagram included.

Ethanol - Dynamic and Kinematic Viscosity vs. Temperature and Pressure

Online calculator, figures and tables showing dynamic and kinematic viscosity of ethanol, C2H5OH, at varying temperature and pressure - Imperial and SI Units.

Ethanol - Density and Specific Weight vs. Temperature and Pressure

Online calculator, figures and tables showing density and specific weight of ethanol at temperatures ranging from -25 to 325 °C (-10 to 620 °F) at atmospheric and higher pressure - Imperial and SI Units.

Ethanol - Specific Heat vs. Temperature and Pressure

Online calculators, figures and tables showing specific heat , Cp and Cv, of gasous and liquid ethanol at temperatures ranging from -25 to 325 °C (-10 to 620 °F) at atmospheric and higher pressure - Imperial and SI Units.

Ethanol Water Mixtures - Densities vs. Temperature

Density of Ethyl Alcohol aqueous solutions.

Ethylene - Thermophysical Properties

Chemical, physical and thermal properties of ethylene, also called ethene, acetene and olefiant gas. Phase diagram included.

Methanol - Thermophysical Properties

Chemical, physical and thermal properties of methanol, CH3OH (also called carbinol, wood alcohol, hydroxy methyl and methyl alcohol). Phase diagram included.

Pentane - Thermophysical Properties

Chemical, physical and thermal properties of pentane, also called n-pentane. Phase diagram included.

Sponsored Links

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

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!

Privacy

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.