Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Ditungsten hexaoxide


Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, References, Notes

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-1163.99kJ/molReviewChase, 1998Data last reviewed in September, 1966
Quantity Value Units Method Reference Comment
gas,1 bar415.49J/mol*KReviewChase, 1998Data last reviewed in September, 1966

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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 298. - 6000.
A 179.7492
B 2.692744
C -0.727978
D 0.062033
E -2.430286
F -1225.845
G 618.5709
H -1163.989
ReferenceChase, 1998
Comment Data last reviewed in September, 1966

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, References, Notes

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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV) Method Reference Comment
12.2 ± 0.2EIBennett, Lin, et al., 1974LLK
13.4EINorman and Staley, 1965RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
O3W2+35. ± 1.?EIBennett, Lin, et al., 1974LLK
O4W2+17.1 ± 0.2?EIBennett, Lin, et al., 1974LLK
O5W2+15.3 ± 0.2OEIBennett, Lin, et al., 1974LLK
W2O5+15.8OEINorman and Staley, 1965RDSH

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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]

Bennett, Lin, et al., 1974
Bennett, S.L.; Lin, S.-S.; Gilles, P.W., High-temperature vaporization of ternary systems. I. Mass spectrometry of oxygen-rich vanadium-tungsten-oxygen species, J. Phys. Chem., 1974, 78, 266. [all data]

Norman and Staley, 1965
Norman, J.H.; Staley, H.G., Thermodynamics of the dimerization and trimerization of gaseous tungsten trioxide and molybdenum trioxide, J. Chem. Phys., 1965, 43, 3804. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References