In gaseous reactions- important for the understanding of the upper atmosphere H 2 O and O react bimolecularly to form two OH radicals- - H for this reaction is 72 kJ at 500 K and E a is 77 kJ mol -1- then E a for the bimolecular recombination of two OH radicals to form H 2 O and O is-

The correct option is C 5 kJ mol ^ 1 H _ 2 O+O _ Ractants(R) ⟶ 2(HO.) _ Product(P) #160;For backward reaction, E _ a =77kJm ol ^ ...

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Standard XII

Chemistry

Activation Energy

In gaseous re...

Question

In gaseous reactions, important for the understanding of the upper atmosphere $H_{2} O$ and $O$ react bimolecularly to form two $O H$ radicals. $Δ H$ for this reaction is $72$ $k J$ at $500$ $K$ and $E_{a}$ is $77$ $k J$ ${m o l}^{- 1}$ ; then $E_{a}$ for the bimolecular recombination of two $O H$ radicals to form $H_{2} O$ and $O$ is:

3

k J

{m o l}^{- 1}

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4

k J

{m o l}^{- 1}

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5

k J

{m o l}^{- 1}

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7

k J

{m o l}^{- 1}

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Solution

The correct option is C $5$ $k J$ ${m o l}^{- 1}$
$H_{2} O + O      R a c t a n t s (R) ⟶ 2 (H O .)      P r o d u c t (P)$
For backward reaction,
$E_{a} = 77 k J m {o l}^{- 1} Δ H^{'} = - 72 k J m {o l}^{- 1} ∴ E_{a} (b a c k w a r d) = E_{a} + Δ H^{'} = (77 - 72) k J m {o l}^{- 1} = 5 k J m {o l}^{- 1}$

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Similar questions

Q. In gaseous reaction important for the understanding of the upper atmosphere

H_{2} O

and

O

react bimolecularly to form two

O H

radicals.

Δ H

for this reaction is 72 kJ at 500 K and

E_{a}

is 77 kJ

{m o l}^{- 1}

E_{a}

for the bimolecular recombination of two OH radicals to form

H_{2} O

and

O

is:

(in kJ

{m o l}^{- 1}

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In gaseous reactions important for the understanding of the upper atmosphere H₂O and O react bimolecularly to form two OH radicals. for this reaction is 72kJ at 500 K and E_a is 77 kJ mol^-1, then E_a for the bimolecular recombination of two OH radicals to form H₂O and O is:

Q. In gaseous reactions important for the understanding of the upper atmosphere

H_{2} O

and O react bimolecularly to form two OH radicals.

Δ H

for this reaction is 72 kJ at 500 K and

E_{a}

77 k J m o l^{- 1}

, then

E_{a}

for the bimolecular recombination of two OH radicals to form

H_{2} O

and O is:

In gaseous reactions important for the understanding of the upper atmosphere $H_{2} O$ and $O$ react bimolecularly to form two $O H$ radicals. $Δ H$ for this reaction is $72$ kJ at $500$ K and $E_{a}$ is $77$ kJ mol^-1, then $E_{a}$ for the bimolecular recombination of two $O H$ radicals to form $H_{2} O$ and $O$ is:

Q. In gaseous reactions important for the understanding of the upper atmosphere

H_{2} O

and O react to form two OH radicals.

Δ H

for this reaction is 72 kJ at 500 K and

E_{a}

77 k J . m o l^{- 1}

, then

E_{a}

for the bimolecular recombination of two OH radicals to form

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In gaseous reactions, important for the understanding of the upper atmosphere H2O and O react bimolecularly to form two OH radicals. ΔH for this reaction is 72 kJ at 500 K and Ea is 77 kJ mol−1; then Ea for the bimolecular recombination of two OH radicals to form H2O and O is:

The correct option is C 5 kJ mol−1H2O+ORactants(R)⟶2(HO.)Product(P) For backward reaction,Ea=77kJmol−1ΔH′=−72kJmol−1∴Ea(backward)=Ea+ΔH′=(77−72)kJmol−1=5kJmol−1