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Thermodynamic properties of some organic compounds: I. PVT relationships and calculated thermodynamic properties for normal butanol
Author(s) -
Shemilt L. W.,
Esplen R. W.,
Mann R. Singh
Publication year - 1959
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450370402
Subject(s) - thermodynamics , vapor pressure , enthalpy , chemistry , superheating , isothermal process , atmospheric temperature range , vapor–liquid equilibrium , compressibility , saturation (graph theory) , butanol , enthalpy of vaporization , equation of state , volume (thermodynamics) , organic chemistry , physics , mathematics , combinatorics , ethanol
Pressure‐volume‐temperature measurements on n ‐butanol have been carried out using the Kay type of pressure‐block apparatus and glass capillary cell. Determinations were made isothermally in the saturated vapor and liquid and superheated vapor regions to above the critical point. Compressibility factors have been calculated. Constants in the Beattie‐Bridgman equation of state have been determined from 250° to 300° C. at pressures up to 75 atmospheres. The thermodynamic properties of normal butanol have been calculated over a temperature range of 0°C. to 300°C. and at pressures up to 1000 lb./sq. in. abs. from the PVT data. Values for the saturated liquid, saturated vapor, and superheated vapor are presented on a pressure‐enthalpy diagram with specific volume and entropy as parameters. The entropy of the saturated vapor increases with temperature over a considerable region, indicating a positive specific heat of the saturated vapor in contrast to the lower alcohols of the same series.