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Disodium


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) 298. - 1400.1400. - 2800.2800. - 6000.
A 35.8717893.03250-494.8500
B 4.131470-44.01861231.3329
C 3.0933117.524129-33.68187
D -3.8033030.3013941.599719
E 0.028058-18.89289856.9041
F 131.265576.912381237.970
G 272.4780307.7273349.9247
H 142.0702142.0702142.0702
ReferenceChase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in December, 1983 Data last reviewed in December, 1983 Data last reviewed in December, 1983
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
298.37.59230.2230.2-0.01
300.37.60230.5230.20.07
400.37.95241.3231.73.85
500.38.35249.9234.57.66
600.38.72256.9237.711.51
700.39.03262.9240.915.40
800.39.25268.1243.919.32
900.39.36272.7246.923.25
1000.39.32276.9249.727.19
1100.39.12280.6252.331.11
1200.38.73284.0254.835.00
1300.38.13287.1257.238.85
1400.37.30289.9259.442.62
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
1400.37.34289.9259.442.62
1500.36.55292.4261.546.31
1600.35.72294.8263.649.93
1700.34.89296.9265.553.46
1800.34.10298.9267.356.90
1900.33.39300.7269.060.28
2000.32.78302.4270.663.59
2100.32.28304.0272.166.84
2200.31.91305.5273.670.05
2300.31.69306.9275.073.23
2400.31.61308.2276.476.39
2500.31.70309.5277.779.55
2600.31.95310.8278.982.73
2700.32.37312.0280.185.95
2800.32.98313.2281.389.22
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
2800.33.23313.2281.389.23
2900.33.66314.3282.492.57
3000.34.42315.5283.595.97
3100.35.42316.6284.699.46
3200.36.61317.8285.6103.1
3300.37.93318.9286.6106.8
3400.39.32320.1287.5110.6
3500.40.75321.2288.5114.7
3600.42.19322.4289.4118.8
3700.43.60323.6290.3123.1
3800.44.97324.8291.2127.5
3900.46.28326.0292.1132.1
4000.47.51327.1292.9136.8
4100.48.65328.3293.8141.6
4200.49.70329.5294.6146.5
4300.50.64330.7295.5151.5
4400.51.47331.9296.3156.6
4500.52.18333.0297.1161.8
4600.52.78334.2297.9167.1
4700.53.26335.3298.7172.4
4800.53.63336.5299.4177.7
4900.53.87337.6300.2183.1
5000.54.01338.7301.0188.5
5100.54.03339.7301.7193.9
5200.53.95340.8302.4199.3
5300.53.76341.8303.2204.7
5400.53.47342.8303.9210.0
5500.53.09343.8304.6215.4
5600.52.61344.7305.3220.6
5700.52.05345.7306.0225.9
5800.51.42346.6306.7231.0
5900.50.71347.4307.4236.2
6000.49.94348.3308.1241.2

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