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Standard XII

Chemistry

Collision Theory

An exothermic...

Question

An exothermic reaction A $\to$ B has an activation energy of 17 kJ per mole of A. The heat of reaction is 40 KJ. The activation energy for the reverse reaction B $\to$ A is

23 kJ

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97 kJ

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57 kJ

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17 kJ

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Solution

The correct option is C 57 kJ
For exothermic reaction
$E_{a}$ (backward) = $E_{a}$ (forward) + Heat of Reaction
(Magnitude only)
= 17 + 40 = 57 kJ

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An exothermic reaction A → B has an activation energy of 17 kJ per mole of A. The heat of reaction is 40 KJ. The activation energy for the reverse reaction B → A is

The correct option is C 57 kJFor exothermic reaction Ea(backward) = Ea(forward) + Heat of Reaction (Magnitude only) = 17 + 40 = 57 kJ

An exothermic reaction A $\to$ B has an activation energy of 17 kJ per mole of A. The heat of reaction is 40 KJ. The activation energy for the reverse reaction B $\to$ A is

The correct option is C 57 kJ
For exothermic reaction
$E_{a}$ (backward) = $E_{a}$ (forward) + Heat of Reaction
(Magnitude only)
= 17 + 40 = 57 kJ