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Standard X

Chemistry

Ionic Salts and Their Characteristic

A catalyst lo...

Question

A catalyst lowers the activation energy of the forward reaction by 20 kJ/ mol. It also changes the activation energy of the backward reaction by an amount:

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Q. For a given reaction, energy of activation for forward reaction

(E_{a f})

80 k J / m o l

Δ H = - 40 k J / m o l

for the reaction. A catalyst lowers

E_{a f}

20 k J / m o l

. The ratio of energy of activation for reverse reaction before and after addition of catalyst is:

Q. For a given reaction, energy of activation for forward reaction

(E_{a f})

80 k J m o l^{- 1}

. Enthalpy change,

Δ H = - 40 k J m o l^{- 1}

for the reaction. A catalyst lowers

E_{a f}

20 k J

m o l^{- 1}

. The ratio of energy of activation for reverse reaction before and after addition of catalyst is:

Q. A reaction is given, which energy of activation for forward reaction is

(E_{a f})

80 k J m o l^{- 1}

.Enthalpy change is

Δ H = - 40 k J m o l^{- 1}

for the reaction. A catalyst lowers

E_{a f}

20 k J

m o l^{- 1}

.What will be the ratio of energy of activation for reverse reaction before and after addition of catalyst:

Q. For a given reaction, the energy of activation for the forward reaction

(E_{a f})

80 {kJ mol}^{- 1}

and

Δ H = - 40 {kJ mol}^{- 1}

. A catalyst lowers

E_{a f}

20 {kJ mol}^{- 1}

. The ratio of energy of activation for the reverse reaction before and after the addition of the catalyst is:

The energies of activation for forward and reverse reactions for $A_{2} + B_{2} ⇌ 2 A B$ are $180 k J m o l^{- 1}$ and $200 k J m o l^{- 1}$ respectively. The presence of a catalyst lowers activation energy of both reactions by $100 k J m o l^{- 1}$ . The enthalpy change of the reaction $(A_{2} + B_{2} \to 2 A B)$ in the presence of a catalyst will be (in kJ $m o l^{- 1}$ )

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