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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 2
31.
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.
Sherwood
Schmidt
Peclet
Stanton
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is
0.31
0.107
0.017
0.215
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Liquid diffusivity is of the order of __________ cm2 /second.
0.01
0.1
10-5 to 10-6
> 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The solvent used in liquid extraction should not have high latent heat of vaporisation, because
the pressure drop and hence the pumping cost will be very high.
it cannot be recovered by distillation.
its recovery cost by distillation may be prohibitatively high.
it will decompose while recovering by distillation.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
is greater than
is lower than
is same as
cannot be predicted as data are insufficient
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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