chromium


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) 2952.078 - 6000.
A 11.54642
B 13.70754
C -3.418429
D 0.393574
E -16.71479
F 382.7327
G 182.8898
H 397.4804
ReferenceChase, 1998
Comment Data last reviewed in June, 1973
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
2952.30.43225.3204.062.89
3000.30.67225.8204.364.35
3100.31.17226.8205.067.44
3200.31.67227.8205.770.59
3300.32.16228.8206.473.78
3400.32.66229.7207.177.02
3500.33.16230.7207.880.31
3600.33.66231.6208.483.65
3700.34.18232.6209.087.04
3800.34.71233.5209.790.49
3900.35.26234.4210.393.99
4000.35.83235.3210.997.54
4100.36.41236.2211.5101.2
4200.37.03237.1212.1104.8
4300.37.67238.0212.7108.6
4400.38.34238.8213.3112.4
4500.39.05239.7213.9116.2
4600.39.79240.6214.4120.2
4700.40.56241.4215.0124.2
4800.41.38242.3215.6128.3
4900.42.24243.2216.1132.5
5000.43.15244.0216.7136.7
5100.44.11244.9217.2141.1
5200.45.11245.7217.8145.6
5300.46.17246.6218.3150.1
5400.47.29247.5218.8154.8
5500.48.46248.4219.4159.6
5600.49.69249.2219.9164.5
5700.50.99250.1220.4169.5
5800.52.35251.0220.9174.7
5900.53.78251.9221.4180.0
6000.55.28252.9222.0185.4

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