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Heat under reflux

Diagram of heat under reflux, showing vertical condenser, water direction and open apparatus(No idea what that is)

Just how can the condenser be vertical?? How is the stuff collected??
Reply 1
Avatar for MC REN
MC REN
14
http://modelscience.com/help/images/distill.gif

and the water has to go in through the bottom hole on the condenser
Reply 2
Avatar for martin101
martin101
10
urgh... no. That picture is of a standard condensing apparatus. Heating under reflux just has your condensing apparatus facing upwards. This means your liquid will become gaseous, then recondense and re-enter your liquid, fluxing between states - hence reflux

The reflux apparatus looks something like this http://www.sas.org/E-Bulletin/2002-02-01/chem/art/Reflux_2.jpg
05231991
Diagram of heat under reflux, showing vertical condenser, water direction and open apparatus(No idea what that is)

Just how can the condenser be vertical?? How is the stuff collected??

This apparatus isn't used to collect the compound like distillation. Reactions in organic chemistry usually have high activation energies, and the compounds involved are volatile (have a low boiling point) You use the reflux apparatus to heat the compounds to high temperatures without all of the compound your reacting/making boiling away :smile:


EDIT looking at the image martin101 posted thats fine, just remember you dont heat with a bunsen burner like shown as that can be dangerous just remember in an exam to write heating using an electric heating mantle
here's a reflux setup (it's a zipped flash file)
reflux.zip13.8KB
Reply 5
Avatar for 05231991
05231991
OP
C:\Documents and Settings\jeff\桌面\Heat.JPG

Cannot open that zip file for some reason,but still thanks very much.

So is this what it should look like, according to what is said above
Reply 6
Avatar for Creative
Creative
10
http://home.clara.net/rod.beavon/reflux.htm

hope this helps.
Reply 7
Avatar for 05231991
05231991
OP
Sorry! How can you attach a file?
05231991
C:\Documents and Settings\jeff\桌面\Heat.JPG

Cannot open that zip file for some reason,but still thanks very much.

So is this what it should look like, according to what is said above


If you're running windows you should be able to open a zip file with a right click and 'extract to'

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