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0 votes
53.6k views
in Chemistry by (54.8k points)

The correct order of heat of combustion for following alkadienes is :

(1) (a) < (b) < (c) 

(2) (b) < (c) < (a)

(3) (c) < (b) < (a) 

(4) (a) < (c) < (b)

2 Answers

+1 vote
by (52.5k points)
selected by
 
Best answer

Answer is (1)

 Generally trans is more stable then c is form.

Heat of combustion (HOC) ∝ 1/Stability

Stability : a > b > c

HOC : c > b > a

+1 vote
by (58.3k points)

Answer is (1)

(a) < (b) < (c)

Heat of combustion ∝ 1/Stability of alkene

(Because no. of carbon are equal)

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