Low-temperature Thermal Data for Some C7H14 Alkylcyclopentanes

Autor:	M. E. Gross, George D. Oliver, Hugh M. Huffman
Rok vydání:	1953
Předmět:	Colloid and Surface Chemistry Liquid state Specific heat Chemistry Enthalpy Melting point Physical chemistry General Chemistry Heat fusion Biochemistry Catalysis Isothermal process
Zdroj:	Journal of the American Chemical Society. 75:2801-2804
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja01108a002
Popis:	Low-temperature thermal measurements were made on the following compounds in the solid and liquid states: 1,1-dimethylcyclopentane (I), 1,cis-2-dimethylcyclopentane (II), 1,trans-3-dimethylcyclopentane (III) and ethylcyclopentane (crystals A(IV) and B(V)). Values of some of the thermodynamic properties determined are: triple points, 203.68 (I), 219.45 (II), 139.48 (III), 134.73 (IV) and 134.0/sup 0/K, (V); heats of fusion, 258 (I), 396 (II), 1768 (III), 1642 (IV) and 1889 cal. mole/sup -1/ (V); entropies for the liquid state at 298.16/sup 0/K, 63.34 (I) 64.33 (II), 64.90 (III), 66.90 (IV) and 66.89 cal. deg./sup -1/ mole/sup -1/ (V). Isothermal transitions were observed in 1,1-dimethylcyclopentane (1551 cal. mole/sup -1/ at 146.80/sup 0/K) and in 1,cis-2-dimethylcyclopentane (1594 cal. mole/sup -1/ at 141.50/sup 0/K). Incomplete studies were made on 1,trans-2-dimethylcyclopentane and 1,cis-3-dimethylcyclopentane.
Databáze:	OpenAIRE
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