Which of the following has highest boiling point and why? (a) 2 methylpentane (b) 2,3 dimethyl butane (c) 2,2 dimythylbutane
Which of the following has highest boiling point and why?
(a) 2 methylpentane
(b) 2,3 dimethyl butane
(c) 2,2 dimythylbutane
4 views
1 Answers
As the branching increases, surface area decreases. As a result, magnitude of Vander Waals forces of attraction decreases and hence the boiling point decreases. Thus, the overall order of decreasing boiling point is: 2 methyl pentane (333k) > 2,3 dimethylbutane (331k) > 2,2 dimethylbutane(323k).
4 views
Answered