All Courses
Get the App Signup / Login
Sign in Open App
Chemical Engineering Exam  >  Chemical Engineering Tests  >  Test: Diffusion In A Binary Gas Mixture - Chemical Engineering MCQ

Test: Diffusion In A Binary Gas Mixture - Chemical Engineering MCQ


Test Description

5 Questions MCQ Test - Test: Diffusion In A Binary Gas Mixture

Test: Diffusion In A Binary Gas Mixture for Chemical Engineering 2024 is part of Chemical Engineering preparation. The Test: Diffusion In A Binary Gas Mixture questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Diffusion In A Binary Gas Mixture MCQs are made for Chemical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Diffusion In A Binary Gas Mixture below.
Solutions of Test: Diffusion In A Binary Gas Mixture questions in English are available as part of our course for Chemical Engineering & Test: Diffusion In A Binary Gas Mixture solutions in Hindi for Chemical Engineering course. Download more important topics, notes, lectures and mock test series for Chemical Engineering Exam by signing up for free. Attempt Test: Diffusion In A Binary Gas Mixture | 5 questions in 10 minutes | Mock test for Chemical Engineering preparation | Free important questions MCQ to study for Chemical Engineering Exam | Download free PDF with solutions
Test: Diffusion In A Binary Gas Mixture - Question 1
Save

Oxygen diffuses through a stagnant layer of air, 1mm thick, ambient temperature 28°C and 1atm total pressure. The partial pressure of oxygen on two sides of layer is P1=0.9atm and P2=0.1atm respectively. Calculate the value of Molar flux (in mol/m2.s) with respect to an observer moving with molar average velocity. Calculate this value at the end of the path where P2=0.1atm. Use R=8.205*10-5m3atmK-1mol-1. 

Detailed Solution for Test: Diffusion In A Binary Gas Mixture - Question 1

Explanation: This is a case of diffusion of A through non-diffusing B.
Molar flux of oxygen, NA= (DAB*P ln⁡[(P-P2)/(P-P1)])/RTl
Putting all the required values in the above equation.
NA=1.904 mol/m2.s
Molar average velocity, U= (NA+NB)/C
U=NA/C (NB=0)
U=NART/P
U=4.702*10-2m/s
Now, UA=UC/CA
UA=U/yA=0.4702 m/s (yA is mole fraction of A at the end)
JA=CA(uA-U)
=PA*( uA-U)/RT
=1.713mol/m2.s.

Test: Diffusion In A Binary Gas Mixture - Question 2
Save

In order to prepare Lithium nitride, air is passed gently over a reactor. Suppose that Nitrogen diffuse to a length 5cm before getting reacted with Lithium. Nitrogen reacts with lithium quickly so that partial pressure of Nitrogen at that point is 0. Reactor is a cylinder of length 10cm and diameter 2cm. Assume air to be a mixture of Nitrogen and Oxygen only. The temperature is 298K and total pressure 1atm. Diffusivity of N2 in O2 is 2*10-5m2/s. Calculate the Molar flux (mol/m2.s) of N2 at a distance of 2.5cm from the top with respect to an observer moving with twice the mass average velocity a direction towards the liquid surface. (R=8.205*10-5m3atmK-1mol-1). Assume z=0 at the top of the reactor. 

Detailed Solution for Test: Diffusion In A Binary Gas Mixture - Question 2

Explanation:
Case: Diffusion of A through non-diffusing B
N2 in air= 79%
O2 in air= 21%
Molar flux of N2, NA=0.025mol/m2.s
Pressure of N2 at the point z=2.5cm=
( DAB*P ln⁡[(P-P5)/(P-P0)])/RTl=(DAB*P ln⁡[(P-P5)/(P-P2.5)])/RTl
P2.5=0.542atm
Velocity of N2= NART/P2.5=112.78*10-5m/s
Molar flux of O2-=0
Velocity of O2=0
Average molar mass=0.542*28+0.458*32=29.832
Mass average velocity= (0.542*28*112.78*10-5)/29.832=57.37*10-5m/s
Required molar flux at the distance of z=5, is
CA(uA-2V)= NA-2PAV/RT=4.242*10-4mol/m2.s.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Diffusion In A Binary Gas Mixture - Question 3
Save

A binary liquid mixture is separated by distillation process. The more volatile A vaporizes while less volatile B gets transported in opposite direction. Latent heat of vaporization of A and B is 0.5unit and 1unit respectively. What will be the relation between molar flux of A and B 

Detailed Solution for Test: Diffusion In A Binary Gas Mixture - Question 3

Explanation: Latent heat of vaporization of A is provided from condensation of B. NA∆HA=NB∆HB.

Test: Diffusion In A Binary Gas Mixture - Question 4
Save

 In an accident a container containing ethanol(s.g 0.789) falls down in a room of dimension 1*1*2(all in m). Ethanol forms a layer of 2mm. Ethanol vaporizes and diffuses through a stagnant film of air of thickness 2.5mm. What will be the time required for the water layer to disappear completely. The diffusivity of ethanol in air is 2.567*10-5 m2/s. the total pressure is 1.013 bar and the pressure of ethanol in bulk air is 0.02244 bar and at the ethanol-air interface is 0.02718bar. The temperature is 25.2°C.
Detailed Solution for Test: Diffusion In A Binary Gas Mixture - Question 4

Explanation: This is the case of diffusion of through non diffusing B.
NA=DP/RTZ*ln⁡[(P-P1)/(P-P2)] NA=(2.567*10-5*1.013)/(0.08317*298.2*2.5*10-3)*ln⁡[(1.013-0.02244)/(1.013-0.02718)] = 2.01*10-6 kmol/m2.s=9.259*10-5kg/m2.s
Amount of ethanol = 2*10-3*1=0.002m3=1.578kg
Time for evaporation= 1.578/9.259*10-5=17042.87s=4.73h.

Test: Diffusion In A Binary Gas Mixture - Question 5
Save

 In the previous question if the floor has micro pores and water penetrates the floor at a constant rate of 0.1kg/m2h, what will be the time required for the water layer to disappear? 
Detailed Solution for Test: Diffusion In A Binary Gas Mixture - Question 5

Explanation: Combined rate of disappearance= 0.1+9.259*10-5*3600=0.433kg/m2h
Time for disappearance= 1.578/0.433=3.64h.

Information about Test: Diffusion In A Binary Gas Mixture Page
In this test you can find the Exam questions for Test: Diffusion In A Binary Gas Mixture solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Diffusion In A Binary Gas Mixture, EduRev gives you an ample number of Online tests for practice
Download as PDF

Important Questions for Diffusion In A Binary Gas Mixture

Find all the important questions for Diffusion In A Binary Gas Mixture at EduRev.Get fully prepared for Diffusion In A Binary Gas Mixture with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Diffusion In A Binary Gas Mixture syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Diffusion In A Binary Gas Mixture resources.

Diffusion In A Binary Gas Mixture MCQs with Answers

Prepare for the Diffusion In A Binary Gas Mixture within the Chemical Engineering exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Diffusion In A Binary Gas Mixture

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Diffusion In A Binary Gas Mixture with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup