In a catalytic reaction involving the formation of ammonia by Haber's process N2 + 3H2-+ 2NH3, the rate of appearance of NH3 was measured as 2.5 × 10-4 mol L-1 s-1. The rate ofdisappearance or H2 will be

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2.50×10−4 mol L−1 s−1

1.25×10−4 mol L−1 s−1

3.75×10−4 mol L−1 s−1

5.00×10−4 mol L−1 s−1

answer is C.

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Detailed Solution

N2(g)+3H2(g)⟶2NH3(g) Rate =−dN2dt=−dH23dt=+dNH32dt∴−dH2dt=32dNH3dt=32×2.5×10−4molL−1s−1=3.75×10−4molL−1s−1

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