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junior college 2 | H2 Maths
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for Q1 i also have to discuss why higher or lower reflux will give a purer distillate
for Q2 i also have to suggest the temperature on each tray is different
Date Posted: 5 years ago
Views: 349
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this is the info part
Date Posted:
5 years ago
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this
Date Posted:
5 years ago
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For question 1, increasing reflux increases purity of the distillate, the reason being as more purer overhead are introduced into back the column as liquid for mass transfer between it and the reboiled bottoms vapor, the concentration difference between the richer light component liquid reflux and the lower concentration reboiled bottoms vapor increases, leading a higher rate of mass transfer, between the two phases, subsequently the reboiled bottoms will be enriched and as it reaches the top, and condenses as distillate, the purity of the lighter components increases.
Date Posted:
5 years ago
bro sorry but i have to explain why theres a separation difference between the total reflux and partial reflux leh
like why is total reflux separation different than tgat of partial reflux
Bro, yes the explanation still holds, total reflux has all of the richer lighter components being introduced back to the column and this gives a higher concentration differential driving force between the liquid (reflux) and reboiler vapor(Bottoms), resulting in better separation of lighter components in distillate.
oh and partial reflux leh. how to explain leh
Sorry Bro, I also cannot be helping you all the time whenever you have problems in school work. I have my own commitments and problems at work to handle. Sorry, I think you need to find other sources of helps besides me. Thanks.
and what does lighter component means. sorry bro i really need ur help
Bro, I can only be helping you this last time, I am tired, sorry. For partial reflux the mass differential drive between vapor (bottoms) and liquid(reflux) is lower, and hence poorer separation. Lighter components means compounds with lower boiling points, while heavier components means compounds with higher boiling points.
means partial reflux has low lighter components? are u deleting this app?
Yes partial reflux has lower amount of lighter components, driving force for mass transfer is smaller.
I will not be checking the app, will turn off notifications.
bro are u deleting this app :/
I am not deleting, but will turn off notification
bro last leh. but i rarely bother u leh only once or twice . why T on each tray is diff?
Please check before asking, I already answered it.
bro i need ur help for laplace thing. remember that time u help me but i cant understand ur working sia
i will post the pic at the ans sec
how can u factor out the top part sia
bro are u still active
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For question 2, the tray 1 temperature at the top is the lowest, while the tray 8 temperature at the bottom of column is highest. The explanation is at the top of the tray, the distillate is rich in the lighter components, hence it has a lower dew point temperature, while the bottoms is rich in heavier components with higher bubble point temperature. As the distillates and bottoms proceeded downward and upward respectively, the distillates get richer in the heavier components and the bottoms get richer in the lighter components, and when they come into contact in equilibrium, the distillate with increase in heavier components increases in dew point temperature , while the bottoms with increase in lighter components decreases in bubble point temperature. Hence temperature of tray increases from top to bottom of column.
Date Posted:
5 years ago
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