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Gas Phase Heat Capacity (Shomate Equation)

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1100.1100. - 6000.
A 26.3287821.01661
B 3.3227049.770603
C 8.590883-1.022633
D -4.8754900.013773
E 0.1070554.541439
F 427.4333435.9017
G 233.7785232.6902
H 435.1360435.1360
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1969 Data last reviewed in June, 1969
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
298.29.16202.6202.6-0.00
300.29.16202.8202.60.06
400.29.39211.2203.82.98
500.29.96217.8206.05.94
600.30.66223.4208.48.97
700.31.41228.2210.912.08
800.32.16232.4213.315.26
900.32.86236.2215.718.51
1000.33.47239.7217.921.83
1100.33.98242.9220.025.20
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
1100.34.30243.0220.025.22
1200.34.45245.9222.128.65
1300.34.71248.7224.032.11
1400.35.05251.3225.935.60
1500.35.44253.7227.639.12
1600.35.86256.0229.342.69
1700.36.31258.2231.046.30
1800.36.77260.3232.649.95
1900.37.24262.3234.153.65
2000.37.71264.2235.557.40
2100.38.18266.1236.961.19
2200.38.65267.9238.365.03
2300.39.11269.6239.668.92
2400.39.55271.3240.972.85
2500.39.99272.9242.276.83
2600.40.42274.5243.480.85
2700.40.84276.0244.584.92
2800.41.24277.5245.789.02
2900.41.63278.9246.893.16
3000.42.00280.4247.997.34
3100.42.36281.7249.0101.6
3200.42.71283.1250.0105.8
3300.43.04284.4251.0110.1
3400.43.35285.7252.0114.4
3500.43.65287.0253.0118.8
3600.43.93288.2254.0123.2
3700.44.20289.4254.9127.6
3800.44.45290.6255.9132.0
3900.44.68291.7256.8136.4
4000.44.90292.9257.6140.9
4100.45.11294.0258.5145.4
4200.45.29295.1259.4149.9
4300.45.46296.1260.2154.5
4400.45.62297.2261.0159.0
4500.45.76298.2261.9163.6
4600.45.88299.2262.7168.2
4700.45.98300.2263.5172.8
4800.46.07301.2264.2177.4
4900.46.15302.1265.0182.0
5000.46.21303.1265.7186.6
5100.46.25304.0266.5191.2
5200.46.28304.9267.2195.9
5300.46.29305.8267.9200.5
5400.46.28306.6268.6205.1
5500.46.26307.5269.3209.7
5600.46.23308.3270.0214.4
5700.46.17309.1270.7219.0
5800.46.11309.9271.4223.6
5900.46.02310.7272.0228.2
6000.45.93311.5272.7232.8

References

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]


Notes

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References