Isochoric specific heat capacity of trans -1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and the HFO-1234ze(E) + CO2 mixture in the liquid phase

Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru Koyama

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    The isochoric specific heat capacity (cV) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 - x) = 0.511 CO2 in the liquid phase were measured with a twin-cell type adiabatic calorimeter. The sample purity of HFO-1234ze(E) and CO2 was certified to have a minimum purity of 0.9996 mole fraction and 0.99999 mole fraction respectively by gas chromatographic analysis. The measurements were obtained for temperatures ranging from (270 to 425) K and at pressures up to 30 MPa. Temperatures were measured with a platinum resistance thermometer on the bottom of each cell and were reported based on the International Temperature Scale of 1990 (ITS-90). Sample pressures were measured with a quartz crystal transducer. Densities were calculated from the volume of the calorimeter cell and the sample mass. The expanded uncertainty (with a coverage factor k = 2) of temperature measurements is 13 mK and 8 kPa for pressure measurements. The expanded relative uncertainty of density is 0.16 %. As a result, the experimental expanded relative uncertainty of the isochoric specific heat capacity (cV) is estimated to be from 3.8 % to 4.6 % in the liquid phase. The cV measurements were almost the same as the values calculated from the proposed equations of state except near the critical isochore.

    Original languageEnglish
    Pages (from-to)1535-1539
    Number of pages5
    JournalJournal of Chemical and Engineering Data
    Issue number4
    Publication statusPublished - Apr 14 2011

    All Science Journal Classification (ASJC) codes

    • General Chemistry
    • General Chemical Engineering


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