Why the bottom of the condensor is connected to the water inelt
Answers
If the water enters through the top and the flow rate is insufficient, the water will merely trickle down one side of the condenser. This would mean only a small section of the condenser would be adequately cooled enough to provide condensing action. By allowing water to enter from the lower hole, the entire volume of the chamber would have to be filled before the water left, provide far more efficient cooling,
It also prevents thermal shock which could cause the glass to crack. Thermal shock is prevented as the coldest point of the condenser is at the bottom, where the water enters and the condensate leaves, whiel the warmest is at the top, where the hot vapours enter and the warmed water leaves, so the temperature difference between the condensate and glass it's in contact with is slightly lower than if it were set up the other way round.
A little long winded and maybe confusing, but I hope this helps.