CBSE Class 11-science Answered
why melting point of n-propane is less than iso propane?
Asked by Gurpreet Singh | 02 Apr, 2014, 04:46: PM
Expert Answer
Dear Gurpreet
n-propane and iso propane are same compounds. There is no difference as only three carbon atoms are present in this alkane.
The melting point is -187.7° C.
n butane has higher melting point than isobutane. It is because:
- Straight chain isomers have higher melting point than their more compact isomers because there are fewer dispersion forces in the symmetrical molecule.
- The dispersion forces of straight chain alkanes increase with molecular weight.
- Stronger intermolecular forces develop in long chains.
Regards
Topperlearning Team.
Topperlearning Team.
Answered by | 03 Apr, 2014, 12:02: PM
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