KOEt

Formula: C₂H₅KO
Molecular weight: 84.1588
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Condensed phase thermochemistry data

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Data compiled by: José A. Martinho Simões

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_solid	-410.9 ± 2.9	kJ/mol	Review	Martinho Simões	A value of -496.2 ± 5.9 kJ/mol was derived in Blanchard, Joly, et al., 1974 for the enthalpy of formation. However, this value is affected by a calculation error. Also, the authors have not accounted for the acid dilution (this correction could not be made in the present database, due to lack of information). These problems were also noted in the data compilations Tel'noi and Rabinovich, 1980 and Wagman, Evans W.H., et al., 1982, where the values quoted for the enthalpy of formation, which rely on the experimental data reported in Blanchard, Joly, et al., 1974, are -410.0 ± 4.2 kJ/mol and -412.1 kJ/mol, respectively. See also comments in Liebman, Martinho Simões, et al., 1995

Reaction thermochemistry data

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Data compiled by: José A. Martinho Simões

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Individual Reactions

C₂H₅KO (cr) + 0.5( • 1100) (solution) = (solution) + 0.5K₂O₄S (solution)

By formula: C₂H₅KO (cr) + 0.5(H₂O₄S • 1100H₂O) (solution) = C₂H₆O (solution) + 0.5K₂O₄S (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-132.3 ± 2.9	kJ/mol	RSC	Blanchard, Joly, et al., 1974	solvent: Sulphuric acid aqueous solution; The reaction enthalpy relies on -10.6 kJ/mol for the enthalpy of solution of EtOH(l) and on 35.1±0.1 for the enthalpy of solution of K2SO4(cr) Blanchard, Joly, et al., 1974.

References

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Martinho Simões
Martinho Simões, J.A., Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]

Blanchard, Joly, et al., 1974
Blanchard, J.M.; Joly, R.D.; Lettoffe, J.M.; Perachon, G.; Thourey, J., J. Chim. Phys. Phys.-Chim. Biol., 1974, 71, 472. [all data]

Tel'noi and Rabinovich, 1980
Tel'noi, V.I.; Rabinovich, I.B., Russ. Chem. Rev., 1980, 49, 603. [all data]

Wagman, Evans W.H., et al., 1982
Wagman, D.D.; Evans W.H.; Parker, V.B.; Schumm, R.H.; Halow, I.; Bailey, S.M.; Churney, K.L.; Nuttall, R.L., The NBS Tables of Chemical Thermodynamic Properties; J. Phys. Chem. Ref. Data, 1982, 11, Suppl. 2. [all data]

Liebman, Martinho Simões, et al., 1995
Liebman, J.F.; Martinho Simões, J.A.; Slayden, S.W., In Lithium Chemistry: A Theoretical and Experimental Overview Wiley: New York, Sapse, A.-M.; Schleyer, P. von Ragué, ed(s)., 1995. [all data]

Notes

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Symbols used in this document:

Δ_fH°_solid Enthalpy of formation of solid at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
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Δ_fH°_solid	Enthalpy of formation of solid at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions