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potassium iodide


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) 2500. - 6000.
A 8.940302
B 0.198002
C -0.000485
D 0.000042
E -0.011316
F -32.71231
G 72.42770
H -30.00000
ReferenceChase, 1998
Comment Data last reviewed in June, 1967
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
2500.9.4381.1173.0120.26
2600.9.4581.4873.3321.20
2700.9.4781.8473.6422.15
2800.9.4982.1973.9423.10
2900.9.5182.5274.2324.05
3000.9.5382.8474.5125.00
3100.9.5583.1674.7825.95
3200.9.5783.4675.0526.91
3300.9.5983.7575.3127.87
3400.9.6184.0475.5628.83
3500.9.6384.3275.8129.79
3600.9.6584.5976.0530.75
3700.9.6784.8576.2831.72
3800.9.6985.1176.5132.69
3900.9.7185.3676.7433.66
4000.9.7385.6176.9534.63
4100.9.7585.8577.1735.60
4200.9.7786.0977.3836.58
4300.9.7986.3277.5837.55
4400.9.8186.5477.7838.53
4500.9.8286.7677.9839.52
4600.9.8486.9878.1740.50
4700.9.8687.1978.3641.48
4800.9.8887.4078.5542.47
4900.9.9087.6078.7343.46
5000.9.9287.8078.9144.45
5100.9.9488.0079.0945.45
5200.9.9688.1979.2646.44
5300.9.9888.3879.4347.44
5400.10.0088.5779.6048.44
5500.10.0288.7579.7649.44
5600.10.0488.9379.9350.44
5700.10.0689.1180.0951.45
5800.10.0889.2980.2452.45
5900.10.1089.4680.4053.46
6000.10.1289.6380.5554.47

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