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Cyclopentane, methyl-

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Gas 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 as indicated in comments:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-25.33kcal/molN/AGood and Smith, 1969Value computed using «DELTA»fHliquid° value of -137.7±0.7 kj/mol from Good and Smith, 1969 and «DELTA»vapH° value of 31.7 kj/mol from Prosen, Johnson, et al., 1946.; DRB
Deltafgas-25.50 ± 0.20kcal/molCcbProsen, Johnson, et al., 1946ALS
Deltafgas-25.84kcal/molN/AMoore, Renquist, et al., 1940Value computed using «DELTA»fHliquid° value of -139.8±1.7 kj/mol from Moore, Renquist, et al., 1940 and «DELTA»vapH° value of 31.7 kj/mol from Prosen, Johnson, et al., 1946.; DRB

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
10.3550.Thermodynamics Research Center, 1997p=1 bar. Selected values of S(T) and Cp(T) are in close agreement with those calculated by [ Scott D.W., 1960] at low temperatures. Discrepancies increase up to 1.8 J/mol*K at 1000-1500 K.; GT
12.67100.
14.97150.
17.87200.
23.81273.15
26.17298.15
26.36300.
36.21400.
45.15500.
52.65600.
58.94700.
64.20800.
68.69900.
72.511000.
75.791100.
78.611200.
81.021300.
83.131400.
84.941500.
88.531750.
91.092000.
93.002250.
94.432500.
95.532750.
96.393000.

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
29.694 ± 0.060333.20McCullough J.P., 1959GT
32.555 ± 0.065362.55
36.365 ± 0.072402.35
39.486 ± 0.079436.25
42.584 ± 0.086471.05

Condensed phase thermochemistry data

Go To: Top, Gas 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:
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
Deltafliquid-32.92 ± 0.17kcal/molCcbGood and Smith, 1969ALS
Deltafliquid-33.08 ± 0.20kcal/molCcbProsen, Johnson, et al., 1946ALS
Deltafliquid-33.42 ± 0.41kcal/molCcbMoore, Renquist, et al., 1940Reanalyzed by Cox and Pilcher, 1970, Original value = -33.73 kcal/mol; see Moore and Parks, 1939; ALS
Quantity Value Units Method Reference Comment
Deltacliquid-941.28 ± 0.14kcal/molCcbGood and Smith, 1969Corresponding «DELTA»fliquid = -32.92 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-941.14 ± 0.18kcal/molCcbProsen, Johnson, et al., 1946Corresponding «DELTA»fliquid = -33.06 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-940.78 ± 0.40kcal/molCcbMoore, Renquist, et al., 1940Reanalyzed by Cox and Pilcher, 1970, Original value = -940.36 ± 0.40 kcal/mol; see Moore and Parks, 1939; Corresponding «DELTA»fliquid = -33.42 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Deltacliquid-945.6kcal/molCcbZubova, 1901Corresponding «DELTA»fliquid = -28.6 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid59.221cal/mol*KN/ADouslin and Huffman, 1946DH
liquid59.20cal/mol*KN/AHuffman, Parks, et al., 1931Extrapolation below 90 K, 57.86 J/mol*K.; DH

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
37.682293.15Siddiqi, Svejda, et al., 1983DH
38.031299.8Connolly, Sage, et al., 1951T = 80 to 200°F.; DH
37.930298.15Douslin and Huffman, 1946T = 12 to 300 K.; DH
37.60295.7Huffman, Parks, et al., 1931T = 92 to 294 K. Value is unsmoothed experimental datum.; DH

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Notes

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

Good and Smith, 1969
Good, W.D.; Smith, N.K., Enthalpies of combustion of toluene, benzene, cyclohexane, cyclohexene, methylcyclopentane, 1-methylcyclopentene, and n-hexane, J. Chem. Eng. Data, 1969, 14, 102-106. [all data]

Prosen, Johnson, et al., 1946
Prosen, E.J.; Johnson, W.H.; Rossini, F.D., Heats of formation and combustion of the normal alkylcyclopentanes and cyclohexanes and the increment per CH2 group for several homologous series of hydrocarbons, J. Res. NBS, 1946, 37, 51-56. [all data]

Moore, Renquist, et al., 1940
Moore, G.E.; Renquist, M.L.; Parks, G.S., Thermal data on organic compounds. XX. Modern combustion data for two methylnonanes, methyl ethyl ketone, thiophene and six cycloparaffins, J. Am. Chem. Soc., 1940, 62, 1505-1507. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Scott D.W., 1960
Scott D.W., Chemical thermodynamic properties of methylcyclopentane and 1-cis-3-dimethylcyclopentane, J. Phys. Chem., 1960, 64, 906-908. [all data]

McCullough J.P., 1959
McCullough J.P., Thermodynamics of cyclopentane, methylcyclopentane and 1,cis-3-dimethylcyclopentane: verification of the concept of pseudorotation, J. Am. Chem. Soc., 1959, 81, 5880-5883. [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]

Moore and Parks, 1939
Moore, G.E.; Parks, G.S., New thermodynamic data for the cyclohexane-methylcyclopentane isomerization, J. Am. Chem. Soc., 1939, 61, 2561-2562. [all data]

Zubova, 1901
Zubova, P., Data about heat of combustion of compound cycle structure, Zh. Fiz. Khim., 1901, 33, 708-722. [all data]

Douslin and Huffman, 1946
Douslin, D.R.; Huffman, H.M., The heat capacities, heats of transition, heats of fusion and entropies of cyclopentane, methylcyclopentane and methylcylohexane, J. Am. Chem. Soc., 1946, 68, 173-176. [all data]

Huffman, Parks, et al., 1931
Huffman, H.M.; Parks, G.S.; Barmore, M., Thermal data on organic compounds. X. Further studies on the heat capacities, entropies and free energies of hydrocarbons, J. Am. Chem. Soc., 1931, 53, 3876-3888. [all data]

Siddiqi, Svejda, et al., 1983
Siddiqi, M.A.; Svejda, P.; Kohler, F., A generalized van der Waals equation of state II. Excess heat capacities of mixtures containing cycloalkanes (C5,C6), methylcycloalkanes (C5,C6) and n-decane, Ber. Bunsenges. Phys. Chem., 1983, 87, 1176-1181. [all data]

Connolly, Sage, et al., 1951
Connolly, T.J.; Sage, B.H.; Lacey, W.N., Isobaric heat capacities at bubble point. n-Hexane, methylcyclopentane, and n-octane, Ind. Eng. Chem., 1951, 43, 946-950. [all data]


Notes

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