Enthalpies for Ethylbenzene, Isooctane, and Ethylcyclohexane in the Fluid State

Mark G. Johnson, Haruki Sato, Arthur G. Williamson, Philip T. Eubank

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


An electrical-matching, flow calorimeter was used to measure the enthalpies of ethylbenzene (349-551 K, 1.5-200 bar), Isooctane (358-520 K, 20-100 bar), and ethylcyclohexane (335-576 K, 20-100 bar). Water/steam calibration measurements show the apparatus capable of 0.1-0.2% precision with no detectable systematic bias. The present measurements are shown to be accurate to ±0.25% in enthalpy and ±2% in heat capacity. Literature vapor pressures, heats of vaporization, and perfect gas state enthalpies, consistent with the present hydrocarbon enthalpies, are used with our results to provide pressure/enthalpy diagrams for both the liquid and vapor states.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalJournal of Chemical and Engineering Data
Issue number2
Publication statusPublished - 1990 Apr
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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