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Gas Phase Heat Capacity (Shomate Equation)

Go To: Top, References, Notes

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. - 6000.
A 37.38291
B 1.650748
C -0.007359
D 0.000626
E -0.085272
F 321.1237
G 325.6010
H 332.6284
ReferenceChase, 1998
Comment Data last reviewed in September, 1963
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
298.36.91281.3281.3-0.01
300.36.93281.6281.30.07
400.37.51292.3282.83.79
500.37.87300.7285.67.56
600.38.13307.6288.711.36
700.38.36313.5291.815.19
800.38.57318.6294.919.04
900.38.76323.2297.822.90
1000.38.94327.3300.526.79
1100.39.12331.0303.130.69
1200.39.30334.4305.634.61
1300.39.47337.6307.938.55
1400.39.64340.5310.142.50
1500.39.81343.2312.346.48
1600.39.97345.8314.350.47
1700.40.14348.2316.254.47
1800.40.31350.5318.158.49
1900.40.47352.7319.862.53
2000.40.64354.8321.566.59
2100.40.80356.8323.270.66
2200.40.97358.7324.774.75
2300.41.13360.5326.278.85
2400.41.30362.3327.782.98
2500.41.46364.0329.187.11
2600.41.62365.6330.591.27
2700.41.79367.2331.895.44
2800.41.95368.7333.199.62
2900.42.11370.2334.4103.8
3000.42.28371.6335.6108.0
3100.42.44373.0336.8112.3
3200.42.60374.3337.9116.5
3300.42.76375.7339.0120.8
3400.42.93376.9340.1125.1
3500.43.09378.2341.2129.4
3600.43.25379.4342.3133.7
3700.43.42380.6343.3138.0
3800.43.58381.7344.3142.4
3900.43.74382.9345.2146.8
4000.43.90384.0346.2151.1
4100.44.07385.1347.1155.5
4200.44.23386.1348.1160.0
4300.44.39387.2348.9164.4
4400.44.55388.2349.8168.8
4500.44.72389.2350.7173.3
4600.44.88390.2351.5177.8
4700.45.04391.2352.4182.3
4800.45.20392.1353.2186.8
4900.45.36393.0354.0191.3
5000.45.53394.0354.8195.9
5100.45.69394.9355.6200.4
5200.45.85395.7356.3205.0
5300.46.02396.6357.1209.6
5400.46.18397.5357.8214.2
5500.46.34398.3358.5218.8
5600.46.50399.2359.3223.5
5700.46.67400.0360.0228.1
5800.46.83400.8360.7232.8
5900.46.99401.6361.4237.5
6000.47.16402.4362.0242.2

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