What state (compressed liquid, sat liquid, sat vapor, mix of sat liquid and sat vapor with a certain quality or super heated vapor) is the benzene in at this T and P? How do you know? Please explain/provide convincing evidence.

You are planning a DEMO experiment and would like to estimate the pressure exerted by 4.5 g grams of benzene at 150 °C in a rigid 1 liter container using two approaches:

(a) Use the ideal gas law.
(b) Use the van der Waals equation of state where a=18.24 (L^2*atm)/?mol?^2 and b=0.1154L/mol for benzene.


Apply ideal gas law:



Apply van der Waals equation of state:



Solve for Van Der Waals parameters:



Solve for vapor pressure of benzene @ 150 °C using the shortcut equation:

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