Mass Transfer
Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

More than
Less than
Either A or B; depends on the solid
Equal to

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Mass Transfer
For water-ethanol system, the minimum reflux ratio

Is the optimum reflux ratio
Is computed from the intercept of the operating line
Cannot be computed
Is computed from the slope of the upper operating line that is tangent to the equilibrium curve

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Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Number of plates decreases very slowly first and then more and more rapidly
Total cost first decreases and then increases
Slope of the operating line in stripping section decreases
Liquid flow increases while the vapor flow decreases for a system

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