The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 375 kj/mol and the change in enthalpy for the reaction is δh = - 225 kj/mol. what is the activation energy for the reverse reaction?

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Princess

Chemistry

1 June, 12:48

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 375 kj/mol and the change in enthalpy for the reaction is δh = - 225 kj/mol. what is the activation energy for the reverse reaction?

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Jeremy Hopkins · Answer 1

Answer is: 600 kJ/mol.

Chemical reaction: NO₂ (g) + CO (g) ⟶ NO (g) + CO₂ (g).

Ea (forward) = 375 kJ/mol.

Ea (reverse) = ? kJ/mol.

ΔH (reaction) = - 225 kJ/mol; this is exothermic reaction.

The enthalpy change of reaction is the change in the energy of the reactants to the products.

ΔH (reaction) = Ea (forward) - Ea (reverse).

-225 kJ/mol = 375 kJ/mol - Ea (reverse).

Ea (reverse) = 600 kJ/mol.