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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 12
46.
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as
Re0.33
Re0.53
Re0.83
Re
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the
temperature rises.
pressure rises.
temperature falls.
pressure falls.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Unit of molal diffusivity is
cm2/sec gm . mole
gm moles/cm2 . sec
gm moles/cm. sec
gm moles/cm2. sec
Answer: Option
Explanation:
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49.
The term "approach" in a cooling tower refers to the difference in the temperature of the
cold water leaving the tower and the wet bulb temperature of the surrounding air.
hot water entering the tower and the wet bulb temperature of the surrounding air.
hot water entering and the cooled water leaving the cooling tower.
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.
unidirectional diffusion from liquid to gas phase
unidirectional diffusion from gas to liquid phase
either 'a' or 'b'
a counter diffusion at an almost equal molar rate
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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