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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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1000.1000. - 6000.
A 6.29389210.49200
B 4.8442401.312430
C 0.666549-0.195746
D -1.2067810.011639
E 0.111612-0.927304
F 194.2810190.7920
G 63.4890166.52651
H 196.0000196.0000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1969 Data last reviewed in December, 1969
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
298.9.0256.7056.700.00
300.9.0156.7656.700.02
400.8.9659.3457.050.91
500.9.1861.3657.721.82
600.9.4963.0658.472.75
700.9.8364.5559.243.72
800.10.1565.8859.984.72
900.10.4567.0960.715.75
1000.10.7168.2161.406.81
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
1000.10.6968.2161.406.81
1100.10.9569.2462.077.89
1200.11.1670.2062.718.99
1300.11.3471.1063.3210.12
1400.11.5071.9563.9111.26
1500.11.6572.7564.4712.42
1600.11.7873.5065.0113.59
1700.11.8974.2265.5314.77
1800.12.0074.9066.0315.97
1900.12.1075.5666.5217.17
2000.12.2076.1866.9818.39
2100.12.2876.7867.4419.61
2200.12.3677.3567.8720.85
2300.12.4477.9068.3022.09
2400.12.5178.4368.7123.33
2500.12.5878.9469.1124.59
2600.12.6579.4469.5025.85
2700.12.7179.9269.8727.12
2800.12.7780.3870.2428.39
2900.12.8380.8370.6029.67
3000.12.8881.2770.9530.96
3100.12.9381.6971.2932.25
3200.12.9882.1071.6233.54
3300.13.0282.5071.9434.84
3400.13.0782.8972.2636.15
3500.13.1183.2772.5737.46
3600.13.1583.6472.8738.77
3700.13.1984.0073.1740.09
3800.13.2384.3573.4641.41
3900.13.2684.7073.7442.73
4000.13.3085.0374.0244.06
4100.13.3385.3674.2945.39
4200.13.3685.6874.5646.73
4300.13.3986.0074.8248.06
4400.13.4286.3175.0849.40
4500.13.4586.6175.3350.75
4600.13.4886.9075.5852.09
4700.13.5087.1975.8253.44
4800.13.5387.4876.0654.79
4900.13.5587.7676.3056.15
5000.13.5888.0376.5357.51
5100.13.6088.3076.7658.86
5200.13.6388.5776.9860.23
5300.13.6588.8277.2061.59
5400.13.6789.0877.4262.96
5500.13.6989.3377.6464.32
5600.13.7289.5877.8565.69
5700.13.7489.8278.0567.07
5800.13.7690.0678.2668.44
5900.13.7990.3078.4669.82
6000.13.8190.5378.6671.20

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