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niobium dioxide


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) 3000. - 6000.
A 52.84280
B 4.543880
C -1.230591
D 0.105124
E -0.973563
F -219.2420
G 329.9540
H -199.9950
ReferenceChase, 1998
Comment Data last reviewed in December, 1973
Temperature
(K)
Cp
(J/mol*K)

(J/mol*K)
-(G° - H°298.15)/T
(J/mol*K)
H° - H°298.15
(kJ/mol)
3000.58.13397.1346.7151.1
3100.58.13399.0348.4156.9
3200.58.13400.9350.0162.7
3300.58.12402.6351.6168.5
3400.58.11404.4353.1174.4
3500.58.10406.1354.6180.2
3600.58.08407.7356.0186.0
3700.58.06409.3357.5191.8
3800.58.04410.8358.8197.6
3900.58.02412.3360.2203.4
4000.58.00413.8361.5209.2
4100.57.97415.2362.8215.0
4200.57.95416.6364.1220.8
4300.57.93418.0365.3226.6
4400.57.92419.3366.5232.4
4500.57.90420.6367.7238.2
4600.57.89421.9368.9244.0
4700.57.89423.2370.0249.7
4800.57.88424.4371.1255.5
4900.57.89425.6372.2261.3
5000.57.90426.7373.3267.1
5100.57.92427.9374.4272.9
5200.57.94429.0375.4278.7
5300.57.97430.1376.4284.5
5400.58.02431.2377.4290.3
5500.58.07432.3378.4296.1
5600.58.13433.3379.4301.9
5700.58.20434.3380.4307.7
5800.58.28435.4381.3313.5
5900.58.38436.3382.2319.4
6000.58.48437.3383.1325.2

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