Question

We have a mixture, which is an ideal solution in the liquid phase and an ideal-gas...

We have a mixture, which is an ideal solution in the liquid phase and an ideal-gas mixture in the vapor phase, of n-heptane (1) and n-octane (2) at a pressure of 1 bar with z1 = 0.25.

(a) What are the bubble and dew temperatures?

(b) Calculate the heat required to bring the solution from its bubble temperature to its dew temperature. Please use the Antoine equations given in P11.5 to find the saturation pressures of these species.

lnPsat= A-B/(C+t)

nC8

A=15.9426

B=3120.29

C=-63.63

nC7

A= 15.8737

B=2911.32

C=-56.51

Use the NIST Chemistry WebBook to find the required enthalpies.

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