Phosphorus dioxide
- Formula: O2P
- Molecular weight: 62.9726
- IUPAC Standard InChI: InChI=1S/O2P/c1-3-2
- IUPAC Standard InChIKey: CJDZTJNITSFKRE-UHFFFAOYSA-N
- CAS Registry Number: 12164-97-5
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry 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 |
|---|---|---|---|---|---|
| ΔfH°gas | -314.52 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1962 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 253.69 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1962 |
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 600. | 600. to 6000. |
|---|---|---|
| A | 11.26546 | 56.69278 |
| B | 135.7880 | 1.031604 |
| C | -159.4602 | -0.242217 |
| D | 70.27446 | 0.018741 |
| E | 0.175039 | -2.283770 |
| F | -322.0613 | -338.3555 |
| G | 234.2843 | 311.3126 |
| H | -314.5243 | -314.5243 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1962 | Data last reviewed in September, 1962 |
Reaction thermochemistry 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 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
By formula: (O3P- • 4294967295O2P) + O2P = O3P-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 654. ± 26. | kJ/mol | Ther | Wang and Wang, 1999 | gas phase |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry 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]
Wang and Wang, 1999
Wang, X.B.; Wang, L.S.,
Vibrationally resolved photoelectron spectroscopy of PO3- and the electronic structure of PO3,
Chem. Phys. Lett., 1999, 313, 1-2, 179-183, https://doi.org/10.1016/S0009-2614(99)00993-8
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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