Fundamental Organic Chemistry
Fundamental Organic Chemistry
Fundamental Organic Chemistry
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vacuum and removing the tube so that the sublimed crystals remain on the tube<br />
until they are scraped off. Fig. (4) .<br />
Fig.(4): Vacuum sublimation<br />
Suggested experiments:<br />
1) Perform an atmospheric sublimation of hexachloroethane .<br />
2) Vacuum sublime naphthalene or caffeine.<br />
Problems:<br />
Which of the following compounds could be subjected to sublimation at<br />
atmospheric pressure?<br />
(a) Compound A:vapor pressure at its melting point=770 mmHg<br />
(b) Compound B:vapor pressure at its melting point=400 mmHg<br />
(c) Compound C:vapor pressure at its melting point=10 mmHg<br />
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