Mass Transfer
McCabe-Thiele method

Uses weight fractions to express liquid and vapour composition
Can use any type of units
Is more accurate than Ponchan-Savarit method
Uses molal units for material and energy balance

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)

Less number of trays are required
Composition of the residue remains unchanged
More number of trays are required but the residue composition remains unchanged
More number of trays are required and the residue composition is more dilute in methanol

ANSWER DOWNLOAD EXAMIANS APP