m617911622

2+ Year Member
Aug 2, 2015
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Pre-Dental
So

Boiling pt can be determine by its inter molecular force, the stronger the force, the higher the boiling pt, the lower the melting pt. Is it right ?

And the lower the vapor pressure, the higher the boiling pt, and the lower the melting pt?

Thank s.
 

Charles_Darwin

2+ Year Member
Mar 28, 2016
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Pre-Dental
1.) Intermolecular forces are the same for boiling point and melting point. So higher IMF = higher boiling point and melting point.

2.) Lower vapor pressure = a higher boiling point and melting point

____
Edit: That's at least what I think and I'm by no means a genius. The only time I know there's an inverse relationship between melting and boiling is when you mix to substances - the boiling point will increase and the melting point will decrease.

Also, trans carbons have a higher melting point whereas cis carbons have a higher boiling point.
 
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m617911622

2+ Year Member
Aug 2, 2015
36
7
Status
Pre-Dental
1.) Intermolecular forces are the same for boiling point and melting point. So higher IMF = higher boiling point and melting point.

2.) Lower vapor pressure = a higher boiling point and melting point

____
Edit: That's at least what I think and I'm by no means a genius. The only time I know there's an inverse relationship between melting and boiling is when you mix to substances - the boiling point will increase and the melting point will decrease.

Also, trans carbons have a higher melting point whereas cis carbons have a higher boiling point.
Thanks ss
 

Mrhyde

Becoming Dr. Jekyll
Apr 13, 2015
170
44
Status
Pre-Dental
So

Boiling pt can be determine by its inter molecular force, the stronger the force, the higher the boiling pt, the lower the melting pt. Is it right ?

And the lower the vapor pressure, the higher the boiling pt, and the lower the melting pt?

Thank s.
Please keep in mind of the common tricky question on this since this same topic crosses over into Orgo also :) .... Branching lowers boiling point BUT branching increase melting point
 
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