codenser in fractional distillation

[hassam]

why the water should enter from the bottom of condenser and flow out thru da top.plz explain ME 5070 w06 qp4 q3 (a)

 

[Zishi]

why the water should enter from the bottom of condenser and flow out thru da top.plz explain ME 5070 w06 qp4 q3 (a)

That's because when it will enter from the bottom, the vapours of the reactants which will try to escape will have the greatest energy. So the as the water will be cold at that place, most vapours will be condensed back into the liquid. Got it?