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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 11
11.
As per Gilliland's equation, the diffusivity is
directly proportional to 'T1.5'.
inversely proportional to 'P'.
dependent on the molecular volume & molecular weight of components.
all 'a', 'b' & 'c'.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Pick out the wrong statement.
When the concentration difference for the mass transfer becomes zero at the bottom of the gas absorption tower, then the upper end of the operating line touches the equilibrium curve.
The average distance between the operating line and equilibrium line is large, when the liquid-gas ratio is also large in case of a counter current gas absorption tower.
The operating line lies above the equilibrium curve in case of a gas desorber.
With decrease in the liquid flow rate for a fixed gas flow rate, the slope of the operating line decreases, in case of gas absorption process.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C.
21.7
20
27.3
18.7
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Which of the following is not fixed by the process requirements, in the design of absorbers ?
Flow rate of the entering gas.
Composition of the entering liquid.
Terminal concentrations of gas stream.
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
If the amount of the steam used in steam distillation is increased, the temperature of distillation
increases
decreases
remains unchanged
depends on relative volatility
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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