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Why does Water have to Enter the Condenser from the Bottom?

posted Oct 17, 2016, 12:23 AM by Grace Ong   [ updated Oct 25, 2016, 2:17 AM ]
The following post was first posted on Blogger on Sunday, 1 June 2014.



organic synthesis - a reflux setup                                      organic synthesis - simple distillation setup

The reason is that if water enters from the top of the condenser, the condenser will never be completely filled with cold water, and a continuous flow of water can be observed in its water jacket.

animated GIF - wrong reflux setup

If water enters from the bottom of the condenser, the condenser will be completely filled with cold water, and an effective cooling system is set up.

When the condenser is set up correctly, the flow of water is barely discernible. In fact, the water looks so still that the condenser jacket does not look like it is filled with water!

animated GIF - correct reflux setup

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