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Tetracarbon


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. - 1200.1200. - 6000.
A 8.33327020.08200
B 20.159700.417416
C -13.30020-0.081463
D 3.3048810.005486
E -0.111889-2.133951
F 228.3550220.8820
G 58.5764171.80550
H 232.0000232.0000
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)
298.11.9954.5654.57-0.00
300.12.0354.6454.570.02
400.13.7858.3655.071.32
500.15.0561.5856.052.76
600.16.0464.4157.224.32
700.16.8366.9558.435.96
800.17.4769.2459.647.68
900.17.9771.3360.829.45
1000.18.3973.2461.9711.27
1100.18.7275.0163.0813.13
1200.19.0176.6564.1415.02
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
1200.18.9976.6564.1415.02
1300.19.2478.1865.1616.93
1400.19.4379.6266.1418.86
1500.19.5980.9667.0920.81
1600.19.7382.2368.0022.78
1700.19.8483.4368.8724.76
1800.19.9484.5769.7126.75
1900.20.0385.6570.5228.75
2000.20.1086.6871.3030.75
2100.20.1787.6672.0632.77
2200.20.2288.6072.7934.79
2300.20.2789.5073.5036.81
2400.20.3290.3674.1838.84
2500.20.3691.1974.8440.87
2600.20.4091.9975.4942.91
2700.20.4392.7676.1144.95
2800.20.4693.5176.7247.00
2900.20.4994.2377.3149.05
3000.20.5194.9277.8951.10
3100.20.5395.5978.4553.15
3200.20.5596.2579.0055.20
3300.20.5796.8879.5357.26
3400.20.5997.4980.0559.32
3500.20.6198.0980.5561.38
3600.20.6298.6781.0563.44
3700.20.6399.2481.5365.50
3800.20.6599.7982.0167.56
3900.20.66100.382.4769.63
4000.20.67100.882.9271.70
4100.20.68101.483.3773.76
4200.20.68101.983.8075.83
4300.20.69102.384.2377.90
4400.20.70102.884.6479.97
4500.20.71103.385.0582.04
4600.20.71103.785.4584.11
4700.20.72104.285.8586.18
4800.20.72104.686.2388.25
4900.20.73105.086.6190.33
5000.20.73105.586.9992.40
5100.20.74105.987.3594.47
5200.20.74106.387.7196.55
5300.20.75106.788.0798.62
5400.20.75107.188.42100.7
5500.20.76107.488.76102.8
5600.20.76107.889.09104.8
5700.20.76108.289.43106.9
5800.20.77108.589.75109.0
5900.20.77108.990.07111.1
6000.20.78109.390.39113.2

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