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Collision Theory

Reaction A + ...

Question

Reaction A + B $\to$ C + D + 38 kcal, has activation energy 20 kcal, Activation energy for reaction C + D $\to$ A + B is

20 kcal

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-20 kcal

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58 kcal

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18 kcal

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Solution

The correct option is C
58 kcal

Ea(backward) = $Δ$ E + Ea(forward)
= 38 + 20 = 58 kcal.

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