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Topic: Boiling point  (Read 6286 times)

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Offline glaizy

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Boiling point
« on: July 17, 2011, 05:09:14 PM »
will the boiling point of a liquid increase or decrease when contaminated with a. a volatile impurity
b. a nonvolatile impurity..


i'm confused!
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Offline Honclbrif

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Re: Boiling point
« Reply #1 on: July 17, 2011, 05:37:07 PM »
Do you know any laws or rules regarding boiling points of solutions?
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Offline glaizy

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Re: Boiling point
« Reply #2 on: July 17, 2011, 05:47:08 PM »
Quote from: Honclbrif on July 17, 2011, 05:37:07 PM
Do you know any laws or rules regarding boiling points of solutions?
only this info.
The simplest solution is made up of a solute and a solvent

 If the solvent is in pure form then the boiling point of the solvent will be that temperature at which the vapour pressure of the solvent = the atmospheric pressure.

 This the simplest definition of the boiling point.If a solute in its pure form is added to the solvent ... then the solute particles get mixed with the particles of the solvent  and all the particles of the solvent from near the surface  can now longer escape to the air , as they  experience gretaer pull or attractive force from the increased no of molecules.
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Offline herrhansen

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Re: Boiling point
« Reply #3 on: July 19, 2011, 11:22:58 AM »
A good example is the depression of the freezing point by adding NaCl to water. This will change the boilingpoint.

Another example is the azeotrope formed when mixing two liquids as toluene and water.
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lopez S

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Re: Boiling point
« Reply #4 on: July 21, 2011, 01:14:13 AM »
Quote from: glaze on July 17, 2011, 05:09:14 PM
will the boiling point of a liquid increase or decrease when contaminated with a. a volatile impurity
b. a nonvolatile impurity..


i'm confused!


Boiling point will increase with volatile impurity.
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Offline AWK

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Re: Boiling point
« Reply #5 on: July 21, 2011, 01:24:36 AM »
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Offline rrr

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Re: Boiling point
« Reply #6 on: August 20, 2011, 10:58:45 AM »
What you know about Raul rules?
I think that this can help you...
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