Acetic acid (data page)
Appearance
This page provides supplementary chemical data on acetic acid.
Material Safety Data Sheet
[edit]The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source and follow its directions.
Structure and properties
[edit]Structure and properties | |||||||||
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Index of refraction, nD | 1.3716 | ||||||||
Dielectric constant, εr | 6.15 ε0 at 20 °C | ||||||||
Bond strength | ? | ||||||||
Bond length | ? | ||||||||
Bond angle | ? | ||||||||
Magnetic susceptibility | ? | ||||||||
Surface tension | 26.6 dyn/cm at 30 °C | ||||||||
Viscosity[1] |
|
Thermodynamic properties
[edit]Phase behavior | |
---|---|
Triple point | 289.8 K (16.7 °C), ? Pa |
Critical point | 593 K (320 °C), 57.8 bar |
Eutectic point with water | –26.7 °C |
Std enthalpy change of fusionΔfusH |
+11.7 kJ/mol |
Std entropy change of fusionΔfusS |
40.5 J/(mol·K) |
Std enthalpy change of vaporizationΔvapH |
+23.7 kJ/mol |
Std entropy change of vaporizationΔvapS |
? J/(mol·K) |
Solid properties | |
Std enthalpy change of formation ΔfH |
? kJ/mol |
Standard molar entropy S |
? J/(mol K) |
Heat capacity cp | ? J/(mol K) |
Liquid properties | |
Std enthalpy change of formation ΔfH |
−483.5 kJ/mol |
Standard molar entropy S |
158.0 J/(mol K) |
Enthalpy of combustion, ΔcH |
–876.1 kJ/mol |
Heat capacity cp | 123.1 J/(mol K) |
Gas properties | |
Std enthalpy change of formation ΔfH |
–438.1 kJ/mol |
Standard molar entropy S |
282.84 J/(mol K) |
Heat capacity cp | 63.4 J/(mol K) |
van der Waals' constants[2] | a = 1782.3 L2 kPa/mol2 b = 0.1068 liter per mole |
Vapor pressure of liquid
[edit]P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 | 1520 | 3800 | 7600 | 15200 | 30400 | 45600 | |
T in °C | –17.2 | 17.5 | 43.0 | 63.0 | 99.0 | 118.1 | 143.5 | 180.3 | 214.0 | 252.0 | 297.0 | — |
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
Distillation data
[edit]Vapor-liquid Equilibrium for Acetic acid/Water[3] P = 760 mm Hg | ||
BP Temp. °C |
mole % water | |
---|---|---|
liquid | vapor | |
116.5 | 2.2 | 5.8 |
114.6 | 5.4 | 12.3 |
113.4 | 8.6 | 16.8 |
113.5 | 9.9 | 18.3 |
113.1 | 10.1 | 18.8 |
110.6 | 18.9 | 29.8 |
107.8 | 30.3 | 43.3 |
106.1 | 41.3 | 54.5 |
104.4 | 52.2 | 64.9 |
103.1 | 62.4 | 73.5 |
102.3 | 69.6 | 79.2 |
101.6 | 77.8 | 85.1 |
100.8 | 87.6 | 91.4 |
100.5 | 92.3 | 94.4 |
100.4 | 94.5 | 96.0 |
100.1 | 98.5 | 98.9 |
Spectral data
[edit]UV-Vis | |||||||||||||||||||||||||||||||||||||||||
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λmax | 207 nm (gas phase) | ||||||||||||||||||||||||||||||||||||||||
Extinction coefficient, ε | ? | ||||||||||||||||||||||||||||||||||||||||
IR | |||||||||||||||||||||||||||||||||||||||||
Major absorption bands[4] |
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NMR | |||||||||||||||||||||||||||||||||||||||||
Proton NMR | δ CDCl3 2.10 (3H), 11.42 (1H) | ||||||||||||||||||||||||||||||||||||||||
Carbon-13 NMR | δ CDCl3 20.8, 178.1 | ||||||||||||||||||||||||||||||||||||||||
Other NMR data | |||||||||||||||||||||||||||||||||||||||||
MS | |||||||||||||||||||||||||||||||||||||||||
Masses of main fragments |
60 (75%), 45 (90%), 43 (100%), 42 (13%), 15 (17%) |
References
[edit]- ^ Lange's Handbook of Chemistry, 10th ed. pp 1669-1674
- ^ Lange's Handbook of Chemistry 10th ed, pp 1522-1524
- ^ "Binary Vapor-Liquid Equilibrium Data" (Queriable database). Chemical Engineering Research Information Center. Retrieved 5 May 2007.
- ^ "Spectral Database for Organic Compounds". Advanced Industrial Science and Technology. Archived from the original (Queriable database) on 14 January 2013. Retrieved 9 June 2007.
- Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD)
- Orlando, John J.; Tyndall, Geoffrey S. (2003). "Gas phase UV absorption spectra for peracetic acid, and for acetic acid monomers and dimers". J. Photochem. Photobiol. A. 157 (2–3): 161–66. Bibcode:2003JPPA..157..161O. doi:10.1016/S1010-6030(03)00067-4.[dead link]
This box:
- Except where noted otherwise, data relate to Standard temperature and pressure.
- Reliability of data general note.