Gases - Specific Heat and Individual Gas Constants (original) (raw)
Specific heat at constant volume, specific heat at constant pressure, specific heat ratio and individual gas constant - R - common gases as argon, air, ether, nitrogen and many more.
The specific heat (= specific heat capacity) at constant pressure and constant volume processes, and the ratio of specific heats and individual gas constants - R - for some commonly used "ideal gases", are in the table below (approximate values at 68 oF (20 oC) and 14.7 psia (1 atm)).
For conversion of units, use the Specific heat online unit converter.
See also tabulated values of specific heat capacity of food and foodstuff, metals and semimetals, common liquids and fluids, common solids and other common substances as well as values of molar heat capacity of common organic substances and inorganic substances.
For full table - rotate the screen!
Gases - Specific Heats and Individual Gas Constants
| Gas or Vapor | Formula | Specific Heat | Specific Heat Ratio | Individual Gas constant - R - | ||||
|---|---|---|---|---|---|---|---|---|
| cp (kJ/kgK) | cv (kJ/kgK) | c p (Btu/(lbmoF)) | c v (Btu/(lbmoF)) | κ = cp/ cv | cp - c v (kJ/kgK) | cp - c v (ft lbf/(lbmoR)) | ||
| Acetone | (CH3)2CO | 1.47 | 1.32 | 0.35 | 0.32 | 1.11 | 0.15 | |
| Acetylene | C2H2 | 1.69 | 1.37 | 0.35 | 0.27 | 1.232 | 0.319 | 59.34 |
| Air | 1.007 | 0.718 | 0.24 | 0.17 | 1.40 | 0.287 | 53.34 | |
| Alcohol (ethanol) | C2H5OH | 1.88 | 1.67 | 0.45 | 0.4 | 1.13 | 0.22 | |
| Alcohol (methanol) | CH3OH | 1.93 | 1.53 | 0.46 | 0.37 | 1.26 | 0.39 | |
| Ammonia | NH3 | 2.160 | 1.66 | 0.52 | 0.4 | 1.31 | 0.53 | 96.5 |
| Argon | Ar | 0.520 | 0.312 | 0.12 | 0.07 | 1.667 | 0.208 | |
| Benzene | C6H6 | 1.09 | 0.99 | 0.26 | 0.24 | 1.12 | 0.1 | |
| Blast furnace gas | 1.03 | 0.73 | 0.25 | 0.17 | 1.41 | 0.3 | 55.05 | |
| Bromine | Br2 | 0.25 | 0.2 | 0.06 | 0.05 | 1.28 | 0.05 | |
| Butane | C4H10 | 1.67 | 1.53 | 0.395 | 0.356 | 1.094 | 0.143 | 26.5 |
| Carbon dioxide | CO2 | 0.8459 | 0.655 | 0.21 | 0.16 | 1.289 | 0.189 | 38.86 |
| Carbon monoxide | CO | 1.02 | 0.72 | 0.24 | 0.17 | 1.40 | 0.297 | 55.14 |
| Carbon disulphide | CS2 | 0.67 | 0.55 | 0.16 | 0.13 | 1.21 | 0.12 | |
| Chlorine | Cl2 | 0.48 | 0.36 | 0.12 | 0.09 | 1.34 | 0.12 | |
| Chloroform | CHCl3 | 0.63 | 0.55 | 0.15 | 0.13 | 1.15 | 0.08 | |
| Coal gas | 2.14 | 1.59 | ||||||
| Combustion products | 1 | 0.24 | ||||||
| Ethane | C2H6 | 1.75 | 1.48 | 0.39 | 0.32 | 1.187 | 0.276 | 51.5 |
| Ether (diethyl ether) | (C2H5)2O | 2.01 | 1.95 | 0.48 | 0.47 | 1.03 | 0.06 | |
| Ethylene | C2H4 | 1.53 | 1.23 | 0.4 | 0.33 | 1.240 | 0.296 | 55.08 |
| Chlorodifluoromethane, R-22 | CHClF2 | 1.18 | ||||||
| Helium | He | 5.251 | 3.12 | 1.25 | 0.75 | 1.667 | 2.08 | 386.3 |
| Hexane | C6H14 | 1.06 | ||||||
| Hydrochloric acid | 0.795 | 0.567 | ||||||
| Hydrogen | H2 | 14.32 | 10.16 | 3.42 | 2.43 | 1.405 | 4.12 | 765.9 |
| Hydrogen Chloride | HCl | 0.8 | 0.57 | 0.191 | 0.135 | 1.41 | 0.23 | 42.4 |
| Hydrogen Sulfide | H2S | 0.243 | 0.187 | 1.32 | 45.2 | |||
| Hydroxyl | OH | 1.76 | 1.27 | 1.384 | 0.489 | |||
| Krypton | Kr | 0.25 | 0.151 | |||||
| Methane | CH4 | 2.22 | 1.70 | 0.59 | 0.45 | 1.304 | 0.518 | 96.4 |
| Methyl Chloride | CH3Cl | 0.240 | 0.200 | 1.20 | 30.6 | |||
| Natural Gas | 2.34 | 1.85 | 0.56 | 0.44 | 1.27 | 0.5 | 79.1 | |
| Neon | Ne | 1.03 | 0.618 | 1.667 | 0.412 | |||
| Nitric Oxide | NO | 0.995 | 0.718 | 0.23 | 0.17 | 1.386 | 0.277 | |
| Nitrogen | N2 | 1.041 | 0.743 | 0.25 | 0.18 | 1.400 | 0.297 | 54.99 |
| Nitrogen tetroxide | N2O4 | 4.69 | 4.6 | 1.12 | 1.1 | 1.02 | 0.09 | |
| Nitrous oxide | N2O | 0.88 | 0.69 | 0.21 | 0.17 | 1.27 | 0.18 | 35.1 |
| Oxygen | O2 | 0.9189 | 0.659 | 0.22 | 0.16 | 1.395 | 0.260 | 48.24 |
| Pentane | C5H12 | 1.07 | ||||||
| Propane | C3H8 | 1.67 | 1.48 | 0.39 | 0.34 | 1.13 | 0.189 | 35.0 |
| Propene (propylene) | C3H6 | 1.5 | 1.31 | 0.36 | 0.31 | 1.15 | 0.18 | 36.8 |
| Water Vapor Steam 1 psia. 120 – 600 oF | H2O | 1.93 | 1.46 | 0.46 | 0.35 | 1.32 | 0.462 | |
| Steam 14.7 psia. 220 – 600 oF | H2O | 1.97 | 1.5 | 0.47 | 0.36 | 1.31 | 0.46 | |
| Steam 150 psia. 360 – 600 oF | H2O | 2.26 | 1.76 | 0.54 | 0.42 | 1.28 | 0.5 | |
| Sulfur dioxide (Sulphur dioxide) | SO2 | 0.64 | 0.51 | 0.15 | 0.12 | 1.29 | 0.13 | 24.1 |
| Xenon | Xe | 0.16 | 0.097 |
- κ = cp/ cv - the specific heat capacity ratio
- cp = specific heat in a constant pressure process
- cv = specific heat in a constant volume process
- R- Individual Gas constant
For conversion of units, use the Specific heat online unit converter.
See also tabulated values of specific heat of food and foodstuff, metals and semimetals, common liquids and fluids, Common solids and other common substances as well as values of molar heat capacity of common organic substances and inorganic substances.
My Short List
Related Topics
Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.
Work, heat and energy systems.
Related Documents
Air - Specific Heat Ratio
Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units.
Heat Capacity
The amount of heat required to change the temperature of a substance by one degree.
Solids - Specific Heats
Common solids - like brick, cement, glass and many more - and their specific heats - in Imperial and SI units.
The Ideal Gas Law
The relationship between volume, pressure, temperature and quantity of a gas, including definition of gas density.