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Excess molar enthalpies and hydrogen bonding in binary mixtures containing glycols or poly(ethylene glycols) and 3-phenylpropyl alcohol at 308.15 K and atmospheric pressure
- Source :
- 424 (2004): 69–-., info:cnr-pdr/source/autori:C. Castellari, R. Francesconi, F. Comelli/titolo:Excess Molar Enthalpies and Hydrogen Bonding in Binary Mixtures Containing Glycols or Poly(ethylene Glycols) and 3-Phenylpropyl Alcohol at 308.15 and Atmospheric Pressure/doi:/rivista:/anno:2004/pagina_da:69/pagina_a:-/intervallo_pagine:69–-/volume:424
- Publication Year :
- 2004
- Publisher :
- Elsevier BV, 2004.
-
Abstract
- Excess molar enthalpies, , of binary liquid mixtures containing as component 1 ethylene glycol, propylene glycol, di(ethylene glycol), tri(ethylene glycol), tetra(ethylene glycol), or some PEGs, such as PEG200, PEG300, PEG400, PEG600, and 2-phenylethyl alcohol (2), have been measured over the entire range of mole fraction x1 at 308.15 K and at atmospheric pressure, using a flow microcalorimeter. The values of vary from a value of −600 J·mol-1 (mixture containing PEG600) up to a maximum of 254 J·mol-1 (mixture containing propylene glycol) decreasing as the chain length of glycols or PEGs increase. Curves are not symmetric, and in the case of mixtures containing PEGs, an intersection among the curves at x1 ≈ 0.65 has been observed. Results were fitted to the Redlich−Kister polynomial to estimate the adjustable parameters and the standard deviations between experimental and calculated values. Qualitative discussion of H bonding in the liquid state is given.
- Subjects :
- Atmospheric pressure
biology
Hydrogen bond
Enthalpy
technology, industry, and agriculture
Alcohol
Condensed Matter Physics
Mole fraction
biology.organism_classification
Polyvinyl alcohol
chemistry.chemical_compound
chemistry
Polymer chemistry
Physical chemistry
Tetra
Physical and Theoretical Chemistry
Instrumentation
Ethylene glycol
Subjects
Details
- ISSN :
- 00406031
- Volume :
- 424
- Database :
- OpenAIRE
- Journal :
- Thermochimica Acta
- Accession number :
- edsair.doi.dedup.....df035209d520df53f85b2a8c7a6bd351