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Pentane, 2,3,4-trimethyl-

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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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos
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
Tboil386.8 ± 0.3KAVGN/AAverage of 18 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus163.8 ± 0.4KAVGN/AAverage of 10 out of 11 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple163.63KN/APitzer and Scott, 1941Uncertainty assigned by TRC = 0.12 K; measured in calorimeter, extrap. to 1/F=0; TRC
Quantity Value Units Method Reference Comment
Tc566.4 ± 0.5KN/ADaubert, 1996 
Tc566.3KN/AMajer and Svoboda, 1985 
Tc566.34KN/AMcMicking and Kay, 1965Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Pc27.3 ± 0.4barN/ADaubert, 1996 
Pc27.298barN/AMcMicking and Kay, 1965Uncertainty assigned by TRC = 0.4053 bar; TRC
Quantity Value Units Method Reference Comment
Vc0.460l/molN/ADaubert, 1996 
Quantity Value Units Method Reference Comment
rhoc2.17 ± 0.04mol/lN/ADaubert, 1996 
rhoc2.17mol/lN/AMcMicking and Kay, 1965Uncertainty assigned by TRC = 0.04 mol/l; TRC
Quantity Value Units Method Reference Comment
Deltavap37.82kJ/molN/AMajer and Svoboda, 1985 
Deltavap37.7 ± 0.1kJ/molCHossenlopp and Scott, 1981AC
Deltavap37.7kJ/molN/AReid, 1972AC
Deltavap37.7 ± 0.1kJ/molCOsborne and Ginnings, 1947AC
Deltavap37.70kJ/molCOsborne and Ginnings, 1947, 2ALS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
32.36386.6N/AMajer and Svoboda, 1985 
37.7303.AStephenson and Malanowski, 1987Based on data from 288. - 400. K.; AC
39.1274.AStephenson and Malanowski, 1987Based on data from 223. - 289. K.; AC
41.3238.IP,EBOsborn and Douslin, 1974Based on data from 223. - 426. K.; AC
39.8263.IPOsborn and Douslin, 1974Based on data from 223. - 278. K.; AC
36.7325.MMWillingham, Taylor, et al., 1945Based on data from 310. - 388. K.; AC

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kJ/mol) beta Tc (K) Reference Comment
298. - 414.53.740.2772566.3Majer and Svoboda, 1985 

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
222.83 - 426.324.156311420.71-44.618Osborn and Douslin, 1974Coefficents calculated by NIST from author's data.
309.72 - 387.533.978861315.084-55.624Williamham, Taylor, et al., 1945 

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
9.268163.63Pitzer and Scott, 1941, 2DH
9.27163.6Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
56.64163.63Pitzer and Scott, 1941, 2DH

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, Phase change data, Notes

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

Pitzer and Scott, 1941
Pitzer, K.S.; Scott, D.W., The Thermodynamics of Branched-Chain Paraffins. The HEat Capacity, Heat of Fusion and Vaporization, and Entropy of 2,3,4-Trimethylpentane, J. Am. Chem. Soc., 1941, 63, 2419-22. [all data]

Daubert, 1996
Daubert, T.E., Vapor-Liquid Critical Properties of Elements and Compounds. 5. Branched Alkanes and Cycloalkanes, J. Chem. Eng. Data, 1996, 41, 365-372. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

McMicking and Kay, 1965
McMicking, J.H.; Kay, W.B., Vapor Pressures and Saturated Liquid and Vapor Densities of The Isomeric Heptanes and Isomeric Octanes, Proc., Am. Pet. Inst., Sect. 3, 1965, 45, 75-90. [all data]

Hossenlopp and Scott, 1981
Hossenlopp, I.A.; Scott, D.W., Vapor heat capacities and enthalpies of vaporization of five alkane hydrocarbons, J. Chem. Thermodyn., 1981, 13, 415-421. [all data]

Reid, 1972
Reid, Robert C., Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00, AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637 . [all data]

Osborne and Ginnings, 1947
Osborne, Nathan S.; Ginnings, Defoe C., Measurements of heat of vaporization and heat capacity of a number of hydrocarbons, J. RES. NATL. BUR. STAN., 1947, 39, 5, 453-17, https://doi.org/10.6028/jres.039.031 . [all data]

Osborne and Ginnings, 1947, 2
Osborne, N.S.; Ginnings, D.C., Measurements of heat of vaporization and heat capacity of a number of hydrocarbons, J. Res. NBS, 1947, 39, 453-477. [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]

Osborn and Douslin, 1974
Osborn, Ann G.; Douslin, Donald R., Vapor-pressure relations for 15 hydrocarbons, J. Chem. Eng. Data, 1974, 19, 2, 114-117, https://doi.org/10.1021/je60061a022 . [all data]

Willingham, Taylor, et al., 1945
Willingham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D., Vapor pressures and boiling points of some paraffin, alkylcyclopentane, alkylcyclohexane, and alkylbenzene hydrocarbons, J. RES. NATL. BUR. STAN., 1945, 35, 3, 219-17, https://doi.org/10.6028/jres.035.009 . [all data]

Williamham, Taylor, et al., 1945
Williamham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D., Vapor Pressures and Boiling Points of Some Paraffin, Alkylcyclopentane, Alkylcyclohexane, and Alkylbenzene Hydrocarbons, J. Res. Natl. Bur. Stand. (U.S.), 1945, 35, 3, 219-244, https://doi.org/10.6028/jres.035.009 . [all data]

Pitzer and Scott, 1941, 2
Pitzer, K.S.; Scott, D.W., The thermodynamics of branched-chain paraffins. The heat capacity, heat of fusion and vaporization, and entropy of 2,3,4-trimethylpentane, J. Am. Chem. Soc., 1941, 63, 2419-2422. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]


Notes

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