Please HELP!!! (1 Viewer)

[Mohit7]

Why does the boiling point rise when there is a [FONT=&quot][/FONT][FONT=&quot]a non-volatile impurity?[/FONT]

 

[onebytwo]

Why does the boiling point rise when there is a [FONT=&quot]a non-volatile impurity?[/FONT]

i think because when youve added the impurity it takes up part of the surface, thus preventing vapourised molecules to escape as easily, so a higher temp. would be required.
not really surethough, just guessing,
give some other BoSer's some time, theyll know

 

[zeek]

when add a non-volatile impurity, it is usually something in the form of a solid or liquid and will create bonds with the molecule already present in the mixture to be added. The new bonds can either be stronger or weaker, depending on the size of the new molecules and the type of bonding. In some cases, stronger bonding is achieved and to make the new mixture change its physical state from liquid to gas, more energy is required to break apart these bonds and allow the molecules to move freely. Thus, this increase in required energy is represented by the increased boiling point.

 

[ne plus ultra]

Quote:

Originally Posted by r3v3ng3
The new bonds can either be stronger or weaker, depending on the size of the new molecules and the type of bonding.

if i mix some more-volatile substance into the original thing, dose the boiling point decrease when comparing with the original thing?