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Excess molar enthalpies and excess molar volumes for (pronane + propan-1-ol) at a temperature of 348.15 K and at pressures of 5, 10, and 15) MPa

โœ Scribed by P.R. Brown; J.D. Moore; A.C. Lewellen; J.B. Ott

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
398 KB
Volume
28
Category
Article
ISSN
0021-9614

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โœฆ Synopsis

Excess molar enthalpies H E m and excess molar volumes V E m have been determined for (propane+propan-1-ol) at a temperature T=348.15 K and pressures p=(5, 10, and 15) MPa. Large and positive H E m with a large positive temperature coefficient (excess molar heat capacity) C E p,m are explained in terms of hydrogen bonds being broken when the propan-1-ol is diluted with the propane. The V E m is negative with a large positive pressure coefficient, suggesting that the propane fits into cavities in the hydrogen-bonded structure of the propan-1-ol, with the number of cavities decreasing with increasing pressure. The V E m for (propane+propan-1-ol) is intermediate between the values obtained for (ethane+propan-1-ol) and (butane+ propan-1-ol). The relative magnitudes of V E m for these three systems are explained in terms of the relationship of the temperature of measurement to the critical temperatures of the alkanes.

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