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Test: Humidification Vapour Gas Mixture - Chemical Engineering MCQ


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10 Questions MCQ Test Mass Transfer - Test: Humidification Vapour Gas Mixture

Test: Humidification Vapour Gas Mixture for Chemical Engineering 2024 is part of Mass Transfer preparation. The Test: Humidification Vapour Gas Mixture questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Humidification Vapour Gas Mixture MCQs are made for Chemical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Humidification Vapour Gas Mixture below.
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Test: Humidification Vapour Gas Mixture - Question 1

Partial pressure equals vapour pressure if it is___________

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 1

Explanation: At saturation, the vapour-gas mixture will be at equilibrium so the vapour pressure equals partial pressure.

Test: Humidification Vapour Gas Mixture - Question 2

Say True or False
I) Vapour- at superheated temperature
II) Gas – at condensation temperature

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 2

Explanation: Since vapour has liquid portion we cannot say superheated. Superheated means free from other component like unique gas.

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Test: Humidification Vapour Gas Mixture - Question 3

Guess the saturated molar absolute humidity of the gas(A.- Vapour(B. mixture at 100 degree Celsius. Vapour pressure of A is 300 mmHg and the total pressure is 760 mmHg.

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 3

Explanation: Saturated molar humidity= Vapour pressure of A/ Vapour pressure of B
= 300/(760-300) =0.65.

Test: Humidification Vapour Gas Mixture - Question 4

 The system is unsaturated if partial pressure _________ equilibrium vapour pressure.

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 4

Explanation: If saturated, the vapour pressure equals partial pressure. If unsaturated, the pressure will be less than vapour pressure.

Test: Humidification Vapour Gas Mixture - Question 5

 Consider a saturated gas(A.-vapour(B. mixture , if the absolute molal humidity is 0.265 and the total pressure= 760 mmHg. Find the vapour pressure of B.

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 5

Explanation: First, we have to find the vapour pressure of A.
0.265= pA/760-pA
pA= 159.21
pB=760-159.21= 600.8.

Test: Humidification Vapour Gas Mixture - Question 6

 The vapour pressure of the nitrogen gas is 400mmHg and the partial pressure is 300mmHg. Find the relative saturation.

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 6

Explanation: Relative saturation or relative humidity = (partial pressure/vapour pressure. x100
=75.

Test: Humidification Vapour Gas Mixture - Question 7

Thermometer measurement temperature is

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 7

Explanation: Dry bulb temperature is the actual measuring temperature of the thermometer.

Test: Humidification Vapour Gas Mixture - Question 8

Find the dew point

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 8

Explanation: The point at 100% saturation is known as dew point. Below the point, the vapour starts to condense.

Test: Humidification Vapour Gas Mixture - Question 9

Temperature at which the partial pressure of the gas-vapour mixture equals vapour pressure _______

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 9

Explanation: At saturation, the vapour pressure equals partial pressure. At dew point, saturation attains.

Test: Humidification Vapour Gas Mixture - Question 10

Check whether we get approximately 80% saturation if the total pressure and the partial pressure of the gas mixture is 760 mmHg and 260 mmHg. Also the vapour pressure is 300 mmHg. 

Detailed Solution for Test: Humidification Vapour Gas Mixture - Question 10

Explanation: Percentage saturation is the ratio of absolute molal humidity to the saturated molal humidity. Absolute molal humidity= 260/(760-260. =0.52. Saturated molal humidity= 300/(760-300 =0.652.
%saturation= 0.52/0.652= 79.8(Approximately 80.

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