(20%) Chapter 12, Boiling point trends: Explain the trend in boiling points of the compounds: which...
- (20%) Chapter 12, Boiling point trends: Explain the trend in boiling points of the compounds: which one does not fit the trend, and why?
|
H2Te |
-2 deg.C |
|
H2Se |
-41.5 deg.C |
|
H2S |
-60.7 deg.C |
|
H2O |
+100 deg.C |
Homework Answers
Boiling point increses with increasing molecular weight. As move from H2O to H2Te boiling point values have to increses. But here H2O does not fit the trend. The reason for this is formation of Hydrogen bond.
Water form hydrogen bonds. So it gave higher boiling point values the remaining all.
So the increasing boiling point order is as follows:
H2S < H2Se < H2Te < H2O
Hydrogen Bond: The bond between high electronegative atom like O,F or N and hydrogen atom ( which is attached to O,F or N) is called hydrogen bond.
here H2O not fit the trend because of Hydrogen bond.
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(20%) Chapter 12, Boiling point trends: Explain the
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