Benzoic acid
- Formula: C7H6O2
- Molecular weight: 122.1213
- IUPAC Standard InChIKey: WPYMKLBDIGXBTP-UHFFFAOYSA-N
- CAS Registry Number: 65-85-0
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Benzenecarboxylic acid; Benzeneformic acid; Benzenemethanoic acid; Benzoesaeure GK; Benzoesaeure GV; Carboxybenzene; Dracylic acid; Phenylcarboxylic acid; Phenylformic acid; Retarder BA; Retardex; Salvo, liquid; Solvo, powder; Tenn-Plas; Acide benzoique; Benzoic acid, tech.; Kyselina benzoova; Benzoesaeure; Salvo powder; E 210; HA 1; HA 1 (acid); Phenylcarboxy; Benzenemethonic acid; Diacylic acid; Flowers of benjamin; Flowers of benzoin; Oracylic acid; Retarder BAX; NSC 149
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Gas phase thermochemistry data
Go To: Top, Condensed 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 by: Glushko Thermocenter, Russian Academy of Sciences, Moscow
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
103.47 | 298.15 | Stull D.R., 1969 | These values were calculated from preliminary assignment of vibrational frequencies. Statistical calculation [ Ali N., 1983] seems to be erroneous. |
104.01 | 300. | ||
138.36 | 400. | ||
170.54 | 500. | ||
196.73 | 600. | ||
217.82 | 700. | ||
234.89 | 800. | ||
248.95 | 900. | ||
260.66 | 1000. |
Condensed phase thermochemistry 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔcH°liquid | -3227.00 ± 0.20 | kJ/mol | Ccb | Gundry, Harrop, et al., 1969 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -3225.73 kJ/mol; Corresponding ΔfHºliquid = -385.06 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°solid | -384.8 ± 0.50 | kJ/mol | Ccb | Corral, 1960 | ALS |
ΔfH°solid | -386. | kJ/mol | Ccb | Landrieu, Baylocq, et al., 1929 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -3228. ± 4. | kJ/mol | AVG | N/A | Average of 17 out of 18 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
S°solid,1 bar | 165.71 | J/mol*K | N/A | Kaji, Tochigi, et al., 1993 | DH |
S°solid,1 bar | 167.73 | J/mol*K | N/A | Arvidsson, Falk, et al., 1976 | DH |
S°solid,1 bar | 167.59 | J/mol*K | N/A | Furukawa, McCoskey, et al., 1951 | DH |
S°solid,1 bar | 167.82 | J/mol*K | N/A | Davies and Staveley, 1957 | DH |
S°solid,1 bar | 170.7 | J/mol*K | N/A | Parks, Huffman, et al., 1933 | Extrapolation below 90 K, 59.25 J/mol*K.; DH |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
259. | 413. | Pacor, 1967 | DH |
Constant pressure heat capacity of solid
Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
147.78 | 300. | Kaji, Tochigi, et al., 1993 | T = 19 to 312 K. Unsmoothed experimental datum.; DH |
147.03 | 298.902 | Sorai, Kaji, et al., 1992 | T = 15 to 305 K. Unsmoothed experimental datum.; DH |
146.23 | 296.29 | Moriya, Matsuo, et al., 1982 | T = 13 to 355 K. NBS SRM 29.; DH |
146.65 | 298.15 | Shakirov and Lyubarskii, 1980 | T = 20 to 300 K.; DH |
146.79 | 298.15 | Arvidsson, Falk, et al., 1976 | T = 6 to 341 K.; DH |
147.07 | 299.62 | Tatsumi, Matsuo, et al., 1975 | T = 12 to 304 K.; DH |
149. | 301. | Mosselman, Mourik, et al., 1974 | One temperature, T = 5 K. Value 5 J/mol*K.; DH |
146.80 | 298.15 | Konicek, Suurkuusk, et al., 1971 | DH |
167.40 | 298.15 | Justice, 1969 | As check on system. Only value at 298 K given.; DH |
147.14 | 299.99 | Suga and Seki, 1965 | T = 13 to 300 K. Value is unsmoothed experimental datum.; DH |
130. | 340. | David, 1964 | T = 298 to 373 K. Mean value. T = uncertain.; DH |
146.31 | 298.15 | Kolesov, Seregin, et al., 1962 | T = 22 to 310 K.; DH |
147.02 | 298.15 | Davies and Staveley, 1957 | T = 20 to 298 K.; DH |
149.79 | 298.15 | Popov and Kolesov, 1956 | T = 80 to 300 K.; DH |
146.81 | 298.15 | Ginnings and Furukawa, 1953 | T = 14 to 410 K.; DH |
146.81 | 298.15 | Furukawa, McCoskey, et al., 1951 | T = 13 to 410 K.; DH |
160.2 | 323. | Satoh and Sogabe, 1939 | T = 0 to 100 C. Mean value.; DH |
145.10 | 295.1 | Parks, Huffman, et al., 1933 | T = 93 to 295 K. Value is unsmoothed experimental datum.; DH |
155.2 | 298. | Andrews, Lynn, et al., 1926 | T = 22 to 200 C.; DH |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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: C7H5O2- + H+ = C7H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1423. ± 9.2 | kJ/mol | G+TS | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrH° | 1423. ± 12. | kJ/mol | G+TS | Cumming and Kebarle, 1978 | gas phase; Recalculated from data in paper; error in Table vs. ladder; B |
ΔrH° | 1423. ± 9.2 | kJ/mol | G+TS | Caldwell, Renneboog, et al., 1989 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1393. ± 8.4 | kJ/mol | IMRE | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrG° | 1393. ± 8.4 | kJ/mol | IMRE | Cumming and Kebarle, 1978 | gas phase; Recalculated from data in paper; error in Table vs. ladder; B |
ΔrG° | 1394. ± 8.4 | kJ/mol | IMRE | Caldwell, Renneboog, et al., 1989 | gas phase; B |
By formula: Br- + C7H6O2 = (Br- • C7H6O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 76.6 ± 7.5 | kJ/mol | IMRE | Paul and Kebarle, 1991 | gas phase; ΔGaff measured at 423 K, ΔSaff taken as that of PhNO2..Br-; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84. | J/mol*K | N/A | Paul and Kebarle, 1991 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 41. ± 4.2 | kJ/mol | IMRE | Paul and Kebarle, 1991 | gas phase; ΔGaff measured at 423 K, ΔSaff taken as that of PhNO2..Br-; B |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
41. | 423. | PHPMS | Paul and Kebarle, 1991 | gas phase; Entropy change calculated or estimated; M |
By formula: H2O + C7H5ClO = C7H6O2 + HCl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -34.04 ± 0.21 | kJ/mol | Cm | Moselhy and Pritchard, 1975 | liquid phase; solvent: Diphenyl-ether; see Carson, Pritchard, et al., 1950 and Davies, Dunning, et al., 1972; ALS |
ΔrH° | -101.9 | kJ/mol | Cm | Carson, Pritchard, et al., 1950 | liquid phase; Heat of hydrolysis; ALS |
By formula: C7H6O + C7H6O3 = 2C7H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -316. ± 13. | kJ/mol | Cm | Briner and Chastonay, 1954 | liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -317. ± 13. kJ/mol; ALS |
By formula: C7H5BrO + H2O = HBr + C7H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -113.1 | kJ/mol | Cm | Carson, Pritchard, et al., 1950 | liquid phase; Heat of hydrolysis; ALS |
By formula: C7H5IO + H2O = HI + C7H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -102.4 | kJ/mol | Cm | Carson, Pritchard, et al., 1950 | liquid phase; Heat of hydrolysis; ALS |
By formula: H2O + C8H8O2 = C7H6O2 + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -73.0 ± 1.9 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
References
Go To: Top, Gas phase thermochemistry data, Condensed 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.
Stull D.R., 1969
Stull D.R., Jr.,
The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]
Ali N., 1983
Ali N.,
Thermodynamic functions of the benzoic acid, phthalic acid and salicylic acid,
Indian J. Phys., 1983, B57, 413-419. [all data]
Gundry, Harrop, et al., 1969
Gundry, H.A.; Harrop, D.; Head, A.J.; Lewis, G.B.,
Thermodynamic properties of organic oxygen compounds. 21. Enthalpies of combustion of benzoic acid, pentan-1-ol, octan-1-ol, and hexadecan-1-ol,
J. Chem. Thermodyn., 1969, 1, 321-332. [all data]
Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P.,
Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]
Corral, 1960
Corral, L.B.,
Investigaciones termoquimicas sobre los acidos toluicos y dimetilbenzoicos,
Rev. R. Acad. Cienc., 1960, 54, 365-403. [all data]
Landrieu, Baylocq, et al., 1929
Landrieu, P.; Baylocq, F.; Johnson, J.R.,
Etude thermochimique dans la serie furanique,
Bull. Soc. Chim. France, 1929, 45, 36-49. [all data]
Kaji, Tochigi, et al., 1993
Kaji, K.; Tochigi, K.; Misawa, Y.; Suzuki, T.,
An adiabatic calorimeter for samples of mass less than 0.1 g and heat capacity measurements on benzoic acid at temperatures from 19 K to 312 K,
J. Chem. Thermodynam., 1993, 25(6), 699-709. [all data]
Arvidsson, Falk, et al., 1976
Arvidsson, K.; Falk, B.; Sunner, S.,
A small sample low temperature adiabatic heat capacity calorimeter with an automatic data acquisition system,
Chem. Scr., 1976, 10, 193-200. [all data]
Furukawa, McCoskey, et al., 1951
Furukawa, G.T.; McCoskey, R.E.; King, G.J.,
Calorimetric properties of benzoic acid from 0 to 410K,
J. Res., 1951, NBS 47, 256-261. [all data]
Davies and Staveley, 1957
Davies, T.; Staveley, L.A.K.,
The behaviour of the ammonium ion in the ammonium salt of tetraphenylboron by comparison of the heat capacities of the ammonium, rubidium, and potassium salts,
Trans. Faraday Soc., 1957, 53, 19-30. [all data]
Parks, Huffman, et al., 1933
Parks, G.S.; Huffman, H.M.; Barmore, M.,
Thermal data on organic compounds. XI. The heat capacities,
entropies and free energies of ten compounds containing oxygen or nitrogen. J. Am. Chem. Soc., 1933, 55, 2733-2740. [all data]
Pacor, 1967
Pacor, P.,
Applicability of the DuPont 900 DTA apparatus in quantitative differential thermal analysis,
Anal. Chim. Acta, 1967, 37, 200-208. [all data]
Sorai, Kaji, et al., 1992
Sorai, M.; Kaji, K.; Kaneko, Y.,
An automated adiabatic calorimeter for the temperature range 13 K to 530 K The heat capacities for benzoic acid from 15 K to 305 K and of synthetic sapphire from 60 K to 505 K,
J. Chem. Thermodynam., 1992, 24(2), 167-180. [all data]
Moriya, Matsuo, et al., 1982
Moriya, K.; Matsuo, T.; Suga, H.,
Low temperature adiabatic calorimeter with a built-in cryo-refrigerator,
J. Chem. Thermodynam., 1982, 14, 1143-1148. [all data]
Shakirov and Lyubarskii, 1980
Shakirov, R.F.; Lyubarskii, M.V.,
Low-temperature heat capacity and thermodynamic functions of methyl trichlorothioacrylate,
SPSTL Deposited Publication 3 KhP-D80, 1980, 19p. [all data]
Tatsumi, Matsuo, et al., 1975
Tatsumi, M.; Matsuo, T.; Suga, H.; Seki, S.,
An adiabatic calorimeter for high-resolution heat capacity measurements in the temperature range from 12 to 300 K,
Bull. Chem. Soc. Japan, 1975, 48, 3060-3066. [all data]
Mosselman, Mourik, et al., 1974
Mosselman, C.; Mourik, J.; Dekker, H.,
Enthalpies of phase change and heat capacities of some long-chain alcohols. Adiabatic semi-microcalorimeter for studies of polymorphism,
J. Chem. Thermodynam., 1974, 6, 477-487. [all data]
Konicek, Suurkuusk, et al., 1971
Konicek, J.; Suurkuusk, J.; Wadso, I.,
A precise drop heat capacity calorimeter for small samples,
Chemica Scripta, 1971, 1, 217-220. [all data]
Justice, 1969
Justice, B.H.,
Low temperature thermodynamic properties of aluminum trichloride,
J. Chem. Eng. Data, 1969, 14, 4-5. [all data]
Suga and Seki, 1965
Suga, H.; Seki, S.,
An automatic adiabatic calorimeter for low temperatures. The heat capacity of standard benzoic acid,
Bull. Chem. Soc. Japan, 1965, 38, 1000-1006. [all data]
David, 1964
David, D.J.,
Determination of specific heat and heat of fusion by differential thermal analysis. Study of theory and operating parameters,
Anal. Chem., 1964, 36, 2162-2166. [all data]
Kolesov, Seregin, et al., 1962
Kolesov, V.P.; Seregin, E.A.; Skuratov, S.M.,
Adiabatic calorimeter of small volume for the determination of true heat capacity over the range 12-340K,
Zhur. Fiz. Khim., 1962, 36, 647-651. [all data]
Popov and Kolesov, 1956
Popov, M.M.; Kolesov, V.P.,
Determination of the true specific heat of solid substances at low temperatures,
Zhur. Obshch. Khim., 1956, 26, 2385-2393. [all data]
Ginnings and Furukawa, 1953
Ginnings, D.C.; Furukawa, G.T.,
Heat capacity standards for the range 14 to 1200°K,
J. Am. Chem. Soc., 1953, 75, 522-527. [all data]
Satoh and Sogabe, 1939
Satoh, S.; Sogabe, T.,
The specific heats of some solid aromatic acids and their ammonium salts and the atomic heat of nitrogen,
Sci. Pap. Inst. Phys. Chem. Res. (Tokyo), 1939, 36, 449-457. [all data]
Andrews, Lynn, et al., 1926
Andrews, D.H.; Lynn, G.; Johnston, J.,
The heat capacities and heat of crystallization of some isomeric aromatic compounds,
J. Am. Chem. Soc., 1926, 48, 1274-1287. [all data]
Fujio, McIver, et al., 1981
Fujio, M.; McIver, R.T., Jr.; Taft, R.W.,
Effects on the acidities of phenols from specific substituent-solvent interactions. Inherent substituent parameters from gas phase acidities,
J. Am. Chem. Soc., 1981, 103, 4017. [all data]
Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P.,
Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A),
Can. J. Chem., 1978, 56, 1. [all data]
Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P.,
Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria,
Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092
. [all data]
Paul and Kebarle, 1991
Paul, G.J.C.; Kebarle, P.,
Stabilities of Complexes of Br- with Substituted Benzenes (SB) Based on Determinations of the Gas-Phase Equilibria Br- + SB = (BrSB)-,
J. Am. Chem. Soc., 1991, 113, 4, 1148, https://doi.org/10.1021/ja00004a014
. [all data]
Moselhy and Pritchard, 1975
Moselhy, G.M.; Pritchard, H.O.,
The thermochemistry of the chloro-benzoyl chlorides,
J. Chem. Thermodyn., 1975, 7, 977-982. [all data]
Carson, Pritchard, et al., 1950
Carson, A.S.; Pritchard, H.O.; Skinner, H.A.,
The heats of hydrolysis of the benzoyl halides,
J. Chem. Soc., 1950, 656-659. [all data]
Davies, Dunning, et al., 1972
Davies, J.V.; Dunning, B.K.; Pritchard, H.O.,
The enthalpy of formation of benzoyl chloride,
J. Chem. Thermodyn., 1972, 4, 731-737. [all data]
Briner and Chastonay, 1954
Briner, E.; Chastonay, P.,
Etude thermochemique de l'autoxydation de Valdehyde benzoique,
Helv. Chim. Acta, 1954, 238, 539-541. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Guthrie and Cullimore, 1980
Guthrie, J.P.; Cullimore, P.A.,
Effect of the acyl substituent on the equilibrium constant for hydration of esters,
Can. J. Chem., 1980, 58, 1281-1294. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,liquid Constant pressure heat capacity of liquid Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) T Temperature ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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