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Standard XII

Chemistry

Effective Equilibrium Constant

For the react...

Question

For the reaction,

$2 H_{2} + 2 N O \to N_{2} + 2 H_{2} O$

the following mechanism has been proposed:-

i) $2 N O ⇌ N_{2} O_{2}$ ; equilibrium constant $K_{1} (f a s t)$

ii) $N_{2} O_{2} + H_{2}_{2} N_{2} O + H_{2} O (s l o w)$

iii) $N_{2} O + H_{2} \to N_{2} + H_{2} O (f a s t)$

What will be the rate law of this reaction?

r = K [N O] [H_{2}]^{2}

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r = K [N O] [H_{2}]

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r = K [N O]^{0} [H_{2}]^{3}

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r = K [N O]^{2} [H_{2}]

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Solution

The correct option is D $r = K [N O]^{2} [H_{2}]$

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Similar questions

Q. For the reaction

2 H_{2} + 2 N O \to N_{2} + 2 H_{2} O

, the following mechanism has been suggested :

2 N O ⇌ N_{2} O_{2}

equilibrium constant

k_{1}

(fast)

N_{2} O_{2} + H_{2}_{2} N_{2} O + H_{2} O (s l o w)

N_{2} O + H_{2}_{3} N_{2} + H_{2} O (f a s t)

Establish the rate law for given reaction.

Q. Consider the reaction :

2 H_{2} (g) + 2 N O (g) \to N_{2} (g) + 2 H_{2} O (g)

The rate law for this reaction is:
Rate

= k [H_{2}] [N O]^{2}

Under what conditions could these steps represent the mechanism?
Step 1:

2 N O ⇌ N_{2} O_{2}

Step 2:

N_{2} O_{2} + H_{2} \to N_{2} O + H_{2} O

Step 3:

N_{2} O + H_{2} \to N_{2} + H_{2} O

The possible mechanism for the reaction:

$2 H_{2 +} 2 N O \to N_{2} + 2 H_{2} O$ is

$(i) 2 N O ⇌ N_{2} O_{2} (i i) N_{2} O_{2} + H_{2} \to N_{2} O + H_{2} O (slow) (i i i) N_{2} O + H_{2} \to N_{2} H_{2} O (fast)$ What is (i) the rate law for the reaction (ii) the order of the reaction?

Q. The unit of rate constant for the reaction,

2 H_{2} + 2 N O \to 2 H_{2} O + N_{2}

which has

r a t e = k [H_{2}] [N O]^{2}

, is:

Q. The unit of rate constant for the reaction

2 H_{2} + 2 NO \to 2 H_{2} O + N_{2}

which has
Rate

= K [H_{2}] [N O]^{2},

is:

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For the reaction, 2H2+2NO→N2+2H2O the following mechanism has been proposed:-i) 2NO⇌N2O2 ; equilibrium constant K1(fast)ii) N2O2+H2k2→N2O+H2O (slow)iii) N2O+H2→N2+H2O (fast)What will be the rate law of this reaction?

The correct option is D r=K[NO]2[H2]

The correct option is D $r = K [N O]^{2} [H_{2}]$