Octaethylcyclotetrasiloxane

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Condensed phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
liquid909.3J/mol*KN/ADzhafarov and Kuliev, 1987 

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
746.8298.15Dzhafarov and Kuliev, 1987T = 5 to 300 K.

Phase change data

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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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Ttriple213.35KN/ADzhafarov and Kuliev, 1987, 2Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
69.2435.AStephenson and Malanowski, 1987Based on data from 420. - 574. K.; AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
13.71213.4Domalski and Hearing, 1990AC

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
134.crystaline, IIIcrystaline, IIDzhafarov and Kuliev, 1987DH

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
12.219208.16crystaline, IIcrystaline, IDzhafarov and Kuliev, 1987DH
13.705213.35crystaline, IliquidDzhafarov and Kuliev, 1987DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
58.69208.16crystaline, IIcrystaline, IDzhafarov and Kuliev, 1987DH
64.38213.35crystaline, IliquidDzhafarov and Kuliev, 1987DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Dzhafarov and Kuliev, 1987
Dzhafarov, O.I.; Kuliev, A.M., Heat capacity, phase transitions, and thermodynamic parameters of octaethylcyclotetrasiloxane, Zhur Fiz. Khim., 1987, 61(3), 602-605. [all data]

Dzhafarov and Kuliev, 1987, 2
Dzhafarov, O.I.; Kuliev, A.M., Heat capacity, phase transitions, and thermodynamic parameters of octaethylcyclotetrasiloxane, Zh. Fiz. Khim., 1987, 61, 602-5. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Domalski and Hearing, 1990
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase Volume II, J. Phys. Chem. Ref. Data, 1990, 19, 4, 881, https://doi.org/10.1063/1.555876 . [all data]


Notes

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