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chromium trioxide

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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Deltafgas-292.88kJ/molReviewChase, 1998Data last reviewed in December, 1973
Quantity Value Units Method Reference Comment
gas,1 bar266.17J/mol*KReviewChase, 1998Data last reviewed in December, 1973

Gas Phase Heat Capacity (Shomate Equation)

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. - 1100.1100. - 6000.
A 36.8374082.72228
B 110.70240.236310
C -101.1478-0.047891
D 32.874480.003320
E -0.508795-4.131089
F -309.6641-329.4193
G 279.0866348.1490
H -292.8804-292.8804
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1973 Data last reviewed in December, 1973

Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director

Quantity Value Units Method Reference Comment
Tfus470.44KN/ADonnelly, Drewes, et al., 1990Uncertainty assigned by TRC = 0.2 K

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Electron affinity determinations

EA (eV) Method Reference Comment
3.660 ± 0.020LPESGutsev, Jena, et al., 2001B
3.64 ± 0.18R-ARudnyi, Vovk, et al., 1989Multi-parameter fit to many IMRE, Ion-ion Eq. «DELTA»Hf(A-) at 0 K; value altered from reference due to conversion from electron convention to ion convention; B
3.70 ± 0.30R-ARudny, Sidirov, et al., 1985value altered from reference due to conversion from electron convention to ion convention; B
2.50 ± 0.30IMRBBricker and Russell, 1987EA between Cr(CO)5, chloranil.; B

Ionization energy determinations

IE (eV) Method Reference Comment
11.6 ± 0.5EIGrimley, Burns, et al., 1961RDSH

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, NIST Free Links, 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]

Donnelly, Drewes, et al., 1990
Donnelly, J.R.; Drewes, L.A.; Johnson, R.L.; Munslow, W.D.; Knapp, K.K.; Sovocool, G.W., Purity and heat of fusion data for environmental standards as determined by differential scanning calorimetry, Thermochim. Acta, 1990, 167, 2, 155, https://doi.org/10.1016/0040-6031(90)80476-F . [all data]

Gutsev, Jena, et al., 2001
Gutsev, G.L.; Jena, P.; Zhai, H.J.; Wang, L.S., Electronic structure of chromium oxides, CrOn- and CrOn (n=1-5) from photoelectron spectroscopy and density functional theory calculations, J. Chem. Phys., 2001, 115, 17, 7935-7944, https://doi.org/10.1063/1.1405438 . [all data]

Rudnyi, Vovk, et al., 1989
Rudnyi, E.B.; Vovk, O.M.; Kaibicheva, E.A.; Sidorov, L.N., Formation Enthalpies of Oxygen Containing Anions of Group VI Elements in the Gas Phase and the Electron Affinities of CrO3, MoO3, and WO3, J. Chem. Thermodyn., 1989, 21, 3, 247, https://doi.org/10.1016/0021-9614(89)90014-1 . [all data]

Rudny, Sidirov, et al., 1985
Rudny, E.B.; Sidirov, L.N.; Kuligina, L.A.; Semenov, G.A., Heterolytic dissociation of potassium chromate in the gas phase and the electron affinity of chromium oxides, Int. J. Mass Spectrom. Ion Phys., 1985, 64, 95. [all data]

Bricker and Russell, 1987
Bricker, D.L.; Russell, D.H., A Study of the Ion/Molecule Reactions of the Cr(CO)5- Anion with Oxygen, J. Am. Chem. Soc., 1987, 109, 13, 3910, https://doi.org/10.1021/ja00247a014 . [all data]

Grimley, Burns, et al., 1961
Grimley, R.T.; Burns, R.P.; Inghram, M.G., Thermodynamics of the vaporization of Cr2O3: dissociation energies of CrO, CrO2, and CrO3, J. Chem. Phys., 1961, 34, 664. [all data]


Notes

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