1. assume the oil is non-volatile, pls determine the operating line and equilibrium line required to reduce the hydrocarbon concentration to 0.05 mol%. Plot both lines and attach the plotted graph to the answer script.

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2. Differentiate between the Linear, Langmuir, and Freundlich isotherms in the adsorption process using a sketch diagram.

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MASS TRANSFER. In a countercurrent stripping tower, an oil containing 2.55 mol percent of a hydrocarbon is stripped using steam. The solvent flow rate is 4 kmol of steam per 100 kmol of oil. The hydrocarbon in the oil has a vapour-liquid relationship of y*=50x, where y* is the mole fraction in the vapour and x is the mole fraction in the liquid. Internal heating keeps the temperature constant, preventing the steam from condensing in the tower. Only steam and no traces of hydrocarbon are present in the solvent input