QJEEM21Ch7408: JEE Main 2021 Chemistry - Class 12 JEEM21Ch7408 Solution: In the above first order reaction the initial concentration of…

Question

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{N_2}{O_{5(g)}} \to 2N{O_{2(g)}} + {1 \over 2}{O_{2(g)}}

In the above first order reaction the initial concentration of N₂O₅ is 2.40

\times

10^{$-$ 2} mol L^{$-$ 1} at 318 K. The concentration of N₂O₅ after 1 hour was 1.60

\times

10^{$-$ 2} mol L^{$-$ 1}. The rate constant of the reaction at 318 K is ______________

\times

10^{$-$ 3} min^{$-$ 1}. (Nearest integer)

[Given : log 3 = 0.477, log 5 = 0.699]

Accepted Answer

K = {{2.303} \over t}\log {{{{[{N_2}{O_5}]}_0}} \over {{{[{N_2}{O_5}]}_t}}}

= {{2.303} \over {60}}\log {{2.4} \over {1.6}} = 6.76 \times {10^{ - 3}}

min^{$-$ 1}

\approx

7

\times

10^{$-$ 3} min^{$-$ 1}

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