Ethanol Ethyl Alcohol Properties C2H6O
Reference data and engineering information about ethanol ethyl alcohol properties c2h6o for chemistry applications.
Overview
Engineering reference data for Ethanol Ethyl Alcohol Properties C2H6O in chemistry.
Key Formulas
Ideal Gas Law
Pressure × Volume = moles × gas constant × temperature.
Molarity
Moles of solute per liter of solution.
pH
Measure of acidity.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Pressure | Pa | |
| Volume | m³ | |
| Moles | mol | |
| Gas constant | 8.314 J/(mol·K) |
Thermophysical Properties
Ethanol (ethyl alcohol, C₂H₅OH) is a versatile compound with wide-ranging applications. Below is a comprehensive data table of its key thermophysical properties, with values typically provided for the liquid phase at standard conditions (25°C / 77°F / 298 K and 1 bara) unless otherwise specified.
Property | Value | Unit | Value | Unit | Value | Unit | Value | Unit |
|---|---|---|---|---|---|---|---|---|
| Acidity (pKa1) | 15.9 | 0 | 0 | 0 | ||||
| Autoignition temperature | 636 | K | 363 | °C | 685 | °F | 0 | |
| Boiling Point | 351.39 | K | 78.2 | °C | 172.8 | °F | 0 | |
| Critical density | 5.91 | mol/dm³ | 272 | kg/m³ | 0.528 | slug/ft³ | 17 | lb/ft³ |
| Critical Pressure | 6.25 | MPa | 62.5 | bara | 61.7 | atm | 906 | psia |
| Critical temperature | 513.9 | K | 240.8 | °C | 465.4 | °F | 0 | |
| 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 |
| Flash point | 286 | K | 13 | °C | 55 | °F | 0 | |
| Specific heat capacity, Cp (gas) | 74 | J/mol·K | 1.6 | kJ/kg·K | 0.383 | Btu/lb·°F | 0 | |
| Specific heat capacity, Cp (liquid) | 118 | J/mol·K | 2.57 | kJ/kg·K | 0.614 | Btu/lb·°F | 0 | |
| Heat of combustion (gas) | 1336.8 | kJ/mol | 29017 | kJ/kg | 12.5 | Btu/lb | 0 | |
| Heat of formation (gas) | -234 | kJ/mol | -5079 | kJ/kg | -2184 | Btu/lb | 0 | |
| Heat of fusion | 4.9 | kJ/mol | 106 | kJ/kg | 45.73 | Btu/lb | 0 | |
| Heat of evaporation | 42.32 | kJ/mol | 919 | kJ/kg | 394.94 | Btu/lb | 0 | |
| Melting point | 159.01 | K | -114.1 | °C | -173.5 | °F | 0 | |
| Molecular Weight | 46.069 | g/mol | 0.10156 | lb/mol | 0 | 0 | ||
| Specific Gravity (liquid, rel. water) | 0.79 | 0 | 0 | 0 | ||||
| Surface tension | 21.97 | dynes/cm | 0.02197 | N/m | 0 | 0 | ||
| Thermal Conductivity | 0.167 | W/m·K | 0.0965 | Btu/hr·ft·°F | 0 | 0 | ||
| Vapor pressure | 0.008 | MPa | 60 | mm Hg | 0.079 | atm | 1.16 | psi |
| Viscosity, dynamic (liquid) | 1.074 | cP | 0 | 0 | 0 | |||
| Viscosity, kinematic (liquid) | 1.36 | cSt | 0 | 0 | 0 |
Source: Engineering ToolBox
Phase Behavior and Critical Point
Ethanol is a liquid under standard conditions. However, it exists in different phases depending on temperature and pressure:
- Phase Diagram: Ethanol exhibits typical phase behavior. The curve between its triple point (150