Hydrogen peroxide
- Formula: H2O2
- Molecular weight: 34.0147
- IUPAC Standard InChIKey: MHAJPDPJQMAIIY-UHFFFAOYSA-N
- CAS Registry Number: 7722-84-1
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Phase change data, 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 | -32.531 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1960 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 55.676 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1960 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 298. to 1500. |
---|---|
A | 8.187541 |
B | 13.18940 |
C | -8.402111 |
D | 2.171951 |
E | -0.100898 |
F | -35.82930 |
G | 61.43891 |
H | -32.53021 |
Reference | Chase, 1998 |
Comment | Data last reviewed in December, 1960 |
Phase change data
Go To: Top, Gas phase thermochemistry data, 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.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 272.26 | K | N/A | Cuthbertson, Matheson, et al., 1928 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 728. | K | N/A | Nikitin, Pavlov, et al., 1995 | Uncertainty assigned by TRC = 15. K; by extrapolation of obs. Tc for aqueous solns, with pulse heating method to pure H2O2; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 217.12 | atm | N/A | Nikitin, Pavlov, et al., 1995 | Uncertainty assigned by TRC = 19.74 atm; by extrapolation of obs. Pc for aqueous solns. with pulse heating method to pure H2O2; TRC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
11.6 | 320. | Maass and Hiebert, 1924 | Based on data from 277. to 363. K.; AC |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change 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
HO2- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 376.50 ± 0.50 | kcal/mol | G+TS | Ramond, Blanksby, et al., 2002 | gas phase; versus HCCH |
ΔrH° | 375.6 ± 2.1 | kcal/mol | G+TS | Bierbaum, Schmidt, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 369.50 ± 0.40 | kcal/mol | IMRE | Ramond, Blanksby, et al., 2002 | gas phase; versus HCCH |
ΔrG° | 368.6 ± 2.0 | kcal/mol | IMRE | Bierbaum, Schmidt, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
By formula: NO3- + H2O2 = (NO3- • H2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.2 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980 |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 12.8 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..NO3-, Keesee, Lee, et al., 1980 |
By formula: NO2- + H2O2 = (NO2- • H2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 20.2 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..NO2-, Keesee, Lee, et al., 1980 |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 14.3 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..NO2-, Keesee, Lee, et al., 1980 |
By formula: Cl- + H2O2 = (Cl- • H2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22.1 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..Cl-, Keesee, Lee, et al., 1980 |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 15.6 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..Cl-, Keesee, Lee, et al., 1980 |
By formula: HO4S- + H2O2 = (HO4S- • H2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 15.9 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..HSO4-, Bohringer, Fahey, et al., 1984 |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 10.7 ± 1.0 | kcal/mol | TDEq | Bohringer, Fahey, et al., 1984 | gas phase; Relative to HOH..HSO4-, Bohringer, Fahey, et al., 1984 |
References
Go To: Top, Gas phase thermochemistry data, Phase change 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]
Cuthbertson, Matheson, et al., 1928
Cuthbertson, A.C.; Matheson, G.L.; Maass, O.,
The Freezing Point and Density of Pure Hydrogen Peroxide,
J. Am. Chem. Soc., 1928, 50, 1120. [all data]
Nikitin, Pavlov, et al., 1995
Nikitin, E.D.; Pavlov, P.A.; Popov, A.P.; Nikitina, H.E.,
Critical properties of hydrogen peroxide determined from direct measurements,
J. Chem. Thermodyn., 1995, 27, 945-52. [all data]
Maass and Hiebert, 1924
Maass, O.; Hiebert, P.G.,
THE PROPERTIES OF PURE HYDROGEN PEROXIDE. V. VAPOR PRESSURE,
J. Am. Chem. Soc., 1924, 46, 12, 2693-2700, https://doi.org/10.1021/ja01677a012
. [all data]
Ramond, Blanksby, et al., 2002
Ramond, T.M.; Blanksby, S.J.; Kato, S.; Bierbaum, V.M.; Davico, G.E.; Schwartz, R.L.; Lineberger, W.C.; Elliso,
Heat of formation of the hydroperoxyl radical HOO via negative ion studies,
J. Phys. Chem. A, 2002, 106, 42, 9641-9647, https://doi.org/10.1021/jp014614h
. [all data]
Bierbaum, Schmidt, et al., 1981
Bierbaum, V.M.; Schmidt, R.J.; DePuy, C.H.; Mead, R.H.; Schulz, P.A.; Lineberger, W.C.,
Reactions of carbanions with triplet and singlet molecular oxygen,
J. Am. Chem. Soc., 1981, 103, 6262. [all data]
Bohringer, Fahey, et al., 1984
Bohringer, H.; Fahey, D.W.; Fehsenfeld, F.C.; Ferguson, E.E.,
Bond energies of the molecules H2O, SO2, H2O2, and HCl to various atmospheric negative ions,
J. Chem. Phys., 1984, 81, 2805. [all data]
Keesee, Lee, et al., 1980
Keesee, R.G.; Lee, N.; Castleman, A.W., Jr.,
Properties of clusters in the gas phase: V. Complexes of neutral molecules onto negative ions,
J. Chem. Phys., 1980, 73, 2195. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
Pc Critical pressure S°gas,1 bar Entropy of gas at standard conditions (1 bar) Tc Critical temperature Tfus Fusion (melting) point ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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