Question: Carbon dioxide at high pressure is used to separate various compounds in citrus oil. The mole fraction of CO, in the liquid (x) and vapour

Carbon dioxide at high pressure is used to separate various compounds in citrus oil. The mole fraction of CO, in the liquid (x) and vapour (y) at 323.2 K is given below for a variety of pressures (Y. Iwai, T. Morotomi, K.

Sakamoto, Y. Koga, and Y. Arai,J. Chem. Eng. Data 41,951 (1996)).

PlMPa 3.946.027.978.949.27

X0.28730.45410.66500.77440.8338

Y0.99820.99800.99730.99580.9922

(a) Plot the portion of the phase diagram represented by these data.

(b) State the compositions and relative proportions of the two phases present after an equimolar gas mixture is compressed to 6.02 MPa at 323.2 K.

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