Question

A chemical reaction $2A\rightleftharpoons 4B+C$ in gas phase occurs in a closed vessel. The concentration of $B$ is found to be increased by $5\times {10}^{-3}$ mole 1:1 in 10 second. Calculate $CO$ the rate of appearance of $B$ (ii) the rate of disappearance of $A$.

Answer 1

(i)(Rate of appearance of $B=5\times {10}^{-3}molL-1/10s$

$=5\times {10}^{-4}mol{L}^{-1}{s}^{-1}$

(ii)Rate of disappearance of A,ie $\Delta \left[A\right]/\Delta t=2/4\times \Delta \left[B\right]/\Delta t$

$=1/2\times 5\times {10}^{-4}mol{L}^{-1}{S}^{-1}$

$=2.5\times {10}^{-4}mol{L}^{-1}{s}^{-1}$