| Polynomial Relation for Ideal Gas Specific Heat as a Function of Temperature | ||||||||||||||||||||
| Substance | Formula | 
|
Temperature, K | % error | ||||||||||||||||
| a | b | c | d | Max. | Avg. | |||||||||||||||
| Nitrogen | N2 | 28.9 | -0.1571 | x 10-2 | 0.8081 | x 10-5 | -2.873 | x 10-9 | 273-1800 | 0.59 | 0.34 | |||||||||
| Oxygen | O2 | 25.48 | 1.52 | x 10-2 | -0.7155 | x 10-5 | 1.312 | x 10-9 | 273-1800 | 1.19 | 0.28 | |||||||||
| Air | -- | 28.11 | 0.1967 | x 10-2 | 0.4802 | x 10-5 | -1.966 | x 10-9 | 273-1800 | 0.72 | 0.33 | |||||||||
| Hydrogen | H2 | 29.11 | -0.1916 | x 10-2 | 0.4003 | x 10-5 | -0.8704 | x 10-9 | 273-1800 | 1.01 | 0.26 | |||||||||
| Carbon monoxide | CO | 28.16 | 0.1675 | x 10-2 | 0.5372 | x 10-5 | -2.222 | x 10-9 | 273-1800 | 0.89 | 0.37 | |||||||||
| Carbon dioxide | CO2 | 22.26 | 5.981 | x 10-2 | -3.501 | x 10-5 | 7.469 | x 10-9 | 273-1800 | 0.67 | 0.22 | |||||||||
| Water vapor | H2O | 32.24 | 0.1923 | x 10-2 | 1.055 | x 10-5 | -3.595 | x 10-9 | 273-1800 | 0.53 | 0.24 | |||||||||
| Nitric oxide | NO | 29.34 | -0.09395 | x 10-2 | 0.9747 | x 10-5 | -4.187 | x 10-9 | 273-1500 | 0.97 | 0.36 | |||||||||
| Nitrous oxide | N2O | 24.11 | 5.8632 | x 10-2 | -3.562 | x 10-5 | 10.58 | x 10-9 | 273-1500 | 0.59 | 0.26 | |||||||||
| Nitrogen dioxide | NO2 | 22.9 | 5.715 | x 10-2 | -3.52 | x 10-5 | 7.87 | x 10-9 | 273-1500 | 0.46 | 0.18 | |||||||||
| Ammonia | NH3 | 27.568 | 2.563 | x 10-2 | 0.99072 | x 10-5 | -6.6909 | x 10-9 | 273-1500 | 0.91 | 0.36 | |||||||||
| Sulfur | S2 | 27.21 | 2.218 | x 10-2 | -1.628 | x 10-5 | 3.986 | x 10-9 | 273-1800 | 0.99 | 0.38 | |||||||||
| Sulfur dioxide | SO2 | 25.78 | 5.795 | x 10-2 | -3.812 | x 10-5 | 8.612 | x 10-9 | 273-1800 | 0.45 | 0.24 | |||||||||
| Sulfur trioxide | SO3 | 16.4 | 14.58 | x 10-2 | -11.2 | x 10-5 | 32.42 | x 10-9 | 273-1300 | 0.29 | 0.13 | |||||||||
| Acetylene | C2H2 | 21.8 | 9.2143 | x 10-2 | -6.527 | x 10-5 | 18.21 | x 10-9 | 273-1500 | 1.46 | 0.59 | |||||||||
| Benzene | C6H6 | -36.22 | 48.475 | x 10-2 | -31.57 | x 10-5 | 77.62 | x 10-9 | 273-1500 | 0.34 | 0.2 | |||||||||
| Methanol | CH4O | 19 | 9.152 | x 10-2 | -1.22 | x 10-5 | -8.039 | x 10-9 | 273-1000 | 0.18 | 0.08 | |||||||||
| Ethanol | C2H6O | 19.9 | 20.96 | x 10-2 | -10.38 | x 10-5 | 20.05 | x 10-9 | 273-1500 | 0.4 | 0.22 | |||||||||
| Hydrogen chloride | HCl | 30.33 | -0.762 | x 10-2 | 1.327 | x 10-5 | -4.338 | x 10-9 | 273-1500 | 0.22 | 0.08 | |||||||||
| Methane | CH4 | 19.89 | 5.024 | x 10-2 | 1.269 | x 10-5 | -11.01 | x 10-9 | 273-1500 | 1.33 | 0.57 | |||||||||
| Ethane | C2H6 | 6.9 | 17.27 | x 10-2 | -6.406 | x 10-5 | 7.285 | x 10-9 | 273-1500 | 0.83 | 0.28 | |||||||||
| Propane | C3H8 | -4.04 | 30.48 | x 10-2 | -15.72 | x 10-5 | 31.74 | x 10-9 | 273-1500 | 0.4 | 0.12 | |||||||||
| n-Butane | C4H10 | 3.96 | 37.15 | x 10-2 | -18.34 | x 10-5 | 35 | x 10-9 | 273-1500 | 0.54 | 0.24 | |||||||||
| i-Butane | C4H10 | -7.913 | 41.6 | x 10-2 | -23.01 | x 10-5 | 49.91 | x 10-9 | 273-1500 | 0.25 | 0.13 | |||||||||
| n-Pentane | C5H12 | 6.774 | 45.43 | x 10-2 | -22.46 | x 10-5 | 42.29 | x 10-9 | 273-1500 | 0.56 | 0.21 | |||||||||
| n-Hexane | C6H14 | 6.938 | 55.22 | x 10-2 | -28.65 | x 10-5 | 57.69 | x 10-9 | 273-1500 | 0.72 | 0.2 | |||||||||
| Ethylene | C2H4 | 3.95 | 15.64 | x 10-2 | -8.344 | x 10-5 | 17.67 | x 10-9 | 273-1500 | 0.54 | 0.13 | |||||||||
| Propylene | C3H6 | 3.15 | 23.83 | x 10-2 | -12.18 | x 10-5 | 24.62 | x 10-9 | 273-1500 | 0.73 | 0.17 | |||||||||