QUESTION $5$

Pure chlorobenzene is contained in a flask attached to an open$-$end mercury manometer. When the flask contents are at $58\mathrm{.}3C,$ the height of the mercury in the arm of the manometer connected to the flask is $747mm$ and that in the arm open to the atmosphere is $52mm.$ At $110C,$ the mercury level is $577mm$ in the arm connected to the flask and $222mm$ in the other arm. Atmospheric pressure is $755mmHg.$

Extrapolate the data using the Clausius$-$Clapeyron equation to estimate the vapor pressure of chlorobenzene at $130C.($Answer: $731\mathrm{.}4mmHg)$

Air saturated with chlorobenzene at $130C$ and $101\mathrm{.}3$kPa is cooled to $58\mathrm{.}3C$ at constant pressure. Estimate the percentage of the chlorobenzene originally in the vapor that condenses. Assume a mole basis of $100$mol for the feed and include a process flow diagram in your solution. $($Answer: $99\mathrm{.}7\%)$

Summarize the assumptions you made in doing the calculation of part $($b$).$

Answers:

$(1)$ Raoult's law holds at initial and final conditions;

$(2)CB$ is the only condensable species $($no water condenses$)$;

$(3)$ Clausius$-$Clapeyron estimate is accurate at $130C.$