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Heat of Reaction

The standard ...

Question

The standard heat of formation of $N O_{2} (g)$ and $N_{2} O_{4} (g)$ are $8.0$ and $4.0$ kcal $m o l^{- 1}$ respectively. The heat of dimerization of $N O_{2}$ in kcal is:

A

- 12

kcal

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B

12

kcal

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C

4

kcal

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D

16

kcal

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Solution

The correct option is A $- 12$ kcal

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