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Forwarded from Chemical engineering with Ankur Sir by Unacademy
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BARC 2025 interview Guidance
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BARC 2025 interview Guidance
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For all the students selected in BARC
I created a playlist of the mock interviews
Must go through this for the reference and preparation
https://youtube.com/playlist?list=PLk7ptZcI9vmi37iB7SmKbGvmmvy_pCCob&si=H3fLy4d3Hz34hZaz
Many of these students are now working in BARC
Very very effective mock interviews
Go through them and prepare accordingly
I created a playlist of the mock interviews
Must go through this for the reference and preparation
https://youtube.com/playlist?list=PLk7ptZcI9vmi37iB7SmKbGvmmvy_pCCob&si=H3fLy4d3Hz34hZaz
Many of these students are now working in BARC
Very very effective mock interviews
Go through them and prepare accordingly
https://unacademy.com/course/profitability-wpp-3-plant-design-and-economics-ankur-bansal/23VUPP05
All the students who completed plant design and economics can join the session
Practice session on Plant Design and Economics
Practice session on Profitability
Practice session 3
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All the students who completed plant design and economics can join the session
Practice session on Plant Design and Economics
Practice session on Profitability
Practice session 3
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Forwarded from Chemical engineering with Ankur Sir by Unacademy
Do you want to know the placement statistics for IIT BHU in detail??
Do you want to know whether to join BHU this year for Mtech or not ??
BHU vs Roorkee
BHU vs Kgp
BHU vs ICT
Do you want to know the answers of these questions???
Do you want to know whether to join BHU this year for Mtech or not ??
BHU vs Roorkee
BHU vs Kgp
BHU vs ICT
Do you want to know the answers of these questions???
Forwarded from Chemical engineering with Ankur Sir by Unacademy
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IIT BHU | Placement Statistics for 2025 | M.Tech Chem Engg | #AnkurBansal #MTechPlacements #BHU
In this video, Ankur Bansal discusses the latest placement statistics for IIT BHU (Chemical Engineering – M.Tech) – Batch of 2025. Learn about average package, highest CTC, top recruiters, core vs non-core opportunities, and overall placement trends for Chemical…
Forwarded from Chemical engineering with Ankur Sir by Unacademy
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IIT BHU | Placement Statistics for 2025 | M.Tech Chem Engg | #AnkurBansal #MTechPlacements #BHU
In this video, Ankur Bansal discusses the latest placement statistics for IIT BHU (Chemical Engineering – M.Tech) – Batch of 2025. Learn about average package, highest CTC, top recruiters, core vs non-core opportunities, and overall placement trends for Chemical…
Forwarded from Chemical engineering with Ankur Sir by Unacademy
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BARC Mock Interview Session | Arun with Ankur Bansal and Ankush Gupta Sir
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Forwarded from Chemical engineering with Ankur Sir by Unacademy
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Complete course of Mass Transfer Operations Part I
First chapter is successfully completed
Second chapter will start from Monday
Those who want to attend Mass Transfer Operations Live, they can join from Monday
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Complete course of Mass Transfer Operations Part I
First chapter is successfully completed
Second chapter will start from Monday
Those who want to attend Mass Transfer Operations Live, they can join from Monday
Enroll in the course now
Forwarded from Chemical engineering with Ankur Sir by Unacademy
Forwarded from Chemical engineering with Ankur Sir by Unacademy
https://youtube.com/live/6k5nWBRn5Cg
Let's discuss the placement for IIT Gandhinagar
Know all about the placement statistics of Mtech Chemical Engineering
Session starts at 08:30 PM
Let's discuss the placement for IIT Gandhinagar
Know all about the placement statistics of Mtech Chemical Engineering
Session starts at 08:30 PM
Forwarded from Chemical engineering with Ankur Sir by Unacademy
https://youtube.com/live/OxzzEJq7r2I
Must attend this session
Session starts in 10 mins
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Must attend this session
Session starts in 10 mins
Ask before taking any decision
Forwarded from Chemical engineering with Ankur Sir by Unacademy
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#GATE2026 & PSU Prep: 7 Months Left – Ankur Bansal Sir’s Full Roadmap
In this video, Ankur Bansal Sir presents a complete roadmap for GATE 2026 and PSU preparation with just 7 months remaining. From how to divide your time, revision strategy, mock test approach, to maintaining motivation and accuracy — this video covers everything.…
Forwarded from Chemical engineering with Ankur Sir by Unacademy
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Forwarded from Chemical engineering with Ankur Sir by Unacademy
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Forwarded from Chemical engineering with Ankur Sir by Unacademy
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yAB is the mole fraction of the solute A in the bulk of gas phase
xAB is the mole fraction of the solute A in the bulk of liquid phase
Difference between yAB and xAB is the overall driving force
But one of the mole fraction is in gas domain and other mole fraction is in liquid domain, therefore the difference mathematically is not valid.
Overall driving force can be defined conceptually but mathematically difference between the mole fractions of the two different domain is not valid.
In order to solve this problem, Lewis and whitman, introduced the concept of interfacial concentrations.
They Introduced xAi at the interface on the liquid domain and yAi at the interface on the gas domain.
In this way, instead of defining the overall driving force, they defined individual driving forces.
yAB - yAi is the individual gas side driving force responsible for the movement of the solute A from the bulk of gas phase to the gas liquid interface.
xAi - xAB is the individual driving force on the liquid side which is responsible for the movement of solute A from the gas liquid interface towards the liquid bulk.
xAB is the mole fraction of the solute A in the bulk of liquid phase
Difference between yAB and xAB is the overall driving force
But one of the mole fraction is in gas domain and other mole fraction is in liquid domain, therefore the difference mathematically is not valid.
Overall driving force can be defined conceptually but mathematically difference between the mole fractions of the two different domain is not valid.
In order to solve this problem, Lewis and whitman, introduced the concept of interfacial concentrations.
They Introduced xAi at the interface on the liquid domain and yAi at the interface on the gas domain.
In this way, instead of defining the overall driving force, they defined individual driving forces.
yAB - yAi is the individual gas side driving force responsible for the movement of the solute A from the bulk of gas phase to the gas liquid interface.
xAi - xAB is the individual driving force on the liquid side which is responsible for the movement of solute A from the gas liquid interface towards the liquid bulk.
Steps in the film theory
1. Mass transfer of the solute A takes place from the bulk of gas phase to the gas liquid interface due to a driving force
(yAB - yAi)
Flux for this case can be defined as driving force multiplied by the mass transfer coefficient expressed in the gas side.
NA = ky (yAB - yAi)
2. Solute A when reaches to the gas liquid interface on the gas side diffuses within the interface towards the liquid side.
As equilibrium exist at the gas liquid interface there for the amount of A transport across the interface will be same but as we defining the two different mole fractions in different domains that's why there mathematical value maybe different.
We define the relationship between yAi and xAi in terms of a linear relationship.
yAi = k xAi
3. Finally the solute present at the gas liquid interface towards the liquid side, reaches the bulk of the liquid phase with the help of a driving force (xAi - xAB).
Flux for this case, can be similarly defined as
NA = kx (xAi - xAB).
1. Mass transfer of the solute A takes place from the bulk of gas phase to the gas liquid interface due to a driving force
(yAB - yAi)
Flux for this case can be defined as driving force multiplied by the mass transfer coefficient expressed in the gas side.
NA = ky (yAB - yAi)
2. Solute A when reaches to the gas liquid interface on the gas side diffuses within the interface towards the liquid side.
As equilibrium exist at the gas liquid interface there for the amount of A transport across the interface will be same but as we defining the two different mole fractions in different domains that's why there mathematical value maybe different.
We define the relationship between yAi and xAi in terms of a linear relationship.
yAi = k xAi
3. Finally the solute present at the gas liquid interface towards the liquid side, reaches the bulk of the liquid phase with the help of a driving force (xAi - xAB).
Flux for this case, can be similarly defined as
NA = kx (xAi - xAB).
NAG is defined as the mass transfer flux for the gas side
NAL is defined as the mass transfer flux for the liquid side
In case of steady state, both the fluxes are equal. It means the number of moles that diffuses from the gas bulk to the interface will be same as the number of moles that will diffuse from the gas liquid interface towards the liquid bulk.
It does not depend upon the value of distribution coefficient that relates the interfacial concentration. For all the three different representations
yAi = xAi
yAi > xAi
yAi < xAi
The fluxes on both the side remains the same.
These different representations are because of the difference in the gas phase number of moles and the liquid phase number of moles.
The value of xAi depends upon the number of moles of liquids side and the value of yAi depends upon the number of moles of the gas side.
When both are different, then the values of xAi and yAi are also different and hence, they are represent differently on the diagram.
As long as the steady state prevails, fluxes on both the sides are equal.
NAL is defined as the mass transfer flux for the liquid side
In case of steady state, both the fluxes are equal. It means the number of moles that diffuses from the gas bulk to the interface will be same as the number of moles that will diffuse from the gas liquid interface towards the liquid bulk.
It does not depend upon the value of distribution coefficient that relates the interfacial concentration. For all the three different representations
yAi = xAi
yAi > xAi
yAi < xAi
The fluxes on both the side remains the same.
These different representations are because of the difference in the gas phase number of moles and the liquid phase number of moles.
The value of xAi depends upon the number of moles of liquids side and the value of yAi depends upon the number of moles of the gas side.
When both are different, then the values of xAi and yAi are also different and hence, they are represent differently on the diagram.
As long as the steady state prevails, fluxes on both the sides are equal.