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Topic: How come iodine sublime at room temperature when its m.pt is above 100 degrees c  (Read 7091 times)

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Offline Jzalkm

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How come iodine sublime at room temperature when its m.pt is above 100 degrees c?
« Last Edit: July 13, 2009, 04:34:04 PM by JzalkMry »

Offline stevet

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I would guess that it is similar to the reason why water evaporates at say 200C (as i am sure you have noticed), while its boiling point is 1000C. Iodone is volatile, and the solid has a low vapour pressure, allowing it to sublime. Also got to do with phase curves...

Offline AWK

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How come iodine sublime at room temperature when its m.pt is above 100 degrees c?
This process is just called sublimation.
Any substance should sublime below temperature or pressure reach the triple point
iodine
http://cwx.prenhall.com/petrucci/medialib/media_portfolio/text_images/FG13_18.JPG
carbon dioxide
http://cwx.prenhall.com/petrucci/medialib/media_portfolio/text_images/FG13_19.JPG
water
http://cwx.prenhall.com/petrucci/medialib/media_portfolio/text_images/FG13_21.JPG
« Last Edit: July 16, 2009, 08:25:59 AM by AWK »
AWK

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