Hydroperoxy radical

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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
Δfgas2.09kJ/molReviewChase, 1998Data last reviewed in September, 1978
Quantity Value Units Method Reference Comment
gas,1 bar229.09J/mol*KReviewChase, 1998Data last reviewed in September, 1978

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. to 2000.2000. to 6000.
A 26.0096045.87510
B 34.858108.814350
C -16.30060-1.636031
D 3.1104410.098053
E -0.018611-10.17380
F -7.140991-26.90210
G 250.7660266.5260
H 2.0920012.092001
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1978 Data last reviewed in September, 1978

Reaction 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.

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Oxygen anion + Hydrogen cation = Hydroperoxy radical

By formula: O2- + H+ = HO2

Quantity Value Units Method Reference Comment
Δr1476.9 ± 3.0kJ/molD-EATravers, Cowles, et al., 1989gas phase
Quantity Value Units Method Reference Comment
Δr1450.5 ± 3.4kJ/molH-TSTravers, Cowles, et al., 1989gas phase

Henry's Law 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: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference Comment
5700. RN/A 
4000.5900.TN/A 
9000. TN/A 
 6600.EN/A 
9000. TN/A 
1200. TN/A missing citation gives an upper limit of kH = 6.8E3 M/atm. In the abstract a range of 1E3 M/atm < kH < 3E3 M/atm is given. The mean value of this range (2E3 M/atm) has been used by missing citation, missing citation, and missing citation.
4600.4800.TN/ACalculated from correlation between the polarizabilities and solubilities of stable gases. The temperature dependence is an estimate of the upper limit.

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law 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]

Travers, Cowles, et al., 1989
Travers, M.J.; Cowles, D.C.; Ellison, G.B., Reinvestigation of the Electron Affinities of O2 and NO, Chem. Phys. Lett., 1989, 164, 5, 449, https://doi.org/10.1016/0009-2614(89)85237-6 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, References