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Dipotassium


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. - 1300.1300. - 6000.
A 22.6587931.01331
B 53.55520-5.786221
C -56.326681.157994
D 16.00840-0.078852
E 0.34951512.42895
F 116.1901134.1629
G 265.4874307.2290
H 123.6832123.6832
ReferenceChase, 1998Chase, 1998
Comment 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)
298.37.98249.7249.7-0.00
300.37.97249.9249.70.07
400.38.28260.9251.23.88
500.38.75269.5254.07.73
600.38.94276.6257.211.62
700.38.75282.6260.415.51
800.38.20287.7263.519.36
900.37.34292.2266.523.14
1000.36.25296.0269.226.82
1100.35.01299.4271.830.38
1200.33.72302.4274.233.82
1300.32.47305.1276.537.13
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
1300.32.63305.1276.537.14
1400.31.31307.5278.640.33
1500.30.20309.6280.643.41
1600.29.25311.5282.546.38
1700.28.44313.2284.349.26
1800.27.73314.8285.952.07
1900.27.10316.3287.554.81
2000.26.55317.7289.057.49
2100.26.06319.0290.460.12
2200.25.62320.2291.762.71
2300.25.22321.3293.065.25
2400.24.86322.4294.267.75
2500.24.54323.4295.370.22
2600.24.25324.4296.472.66
2700.23.99325.3297.575.07
2800.23.74326.1298.577.46
2900.23.53327.0299.479.82
3000.23.33327.8300.482.16
3100.23.15328.5301.384.49
3200.22.99329.2302.186.79
3300.22.84330.0303.089.09
3400.22.70330.6303.891.36
3500.22.58331.3304.593.63
3600.22.47331.9305.395.88
3700.22.37332.5306.098.12
3800.22.28333.1306.7100.4
3900.22.20333.7307.4102.6
4000.22.13334.3308.1104.8
4100.22.06334.8308.7107.0
4200.22.00335.3309.3109.2
4300.21.95335.9310.0111.4
4400.21.90336.4310.6113.6
4500.21.85336.9311.1115.8
4600.21.81337.3311.7118.0
4700.21.77337.8312.2120.1
4800.21.74338.3312.8122.3
4900.21.71338.7313.3124.5
5000.21.67339.2313.8126.7
5100.21.64339.6314.3128.8
5200.21.61340.0314.8131.0
5300.21.58340.4315.3133.1
5400.21.54340.8315.8135.3
5500.21.51341.2316.2137.5
5600.21.47341.6316.7139.6
5700.21.43342.0317.1141.8
5800.21.39342.4317.5143.9
5900.21.35342.7318.0146.0
6000.21.30343.1318.4148.2

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