Question

The reaction $A\left(g\right)+2B\left(g\right)\to C\left(g\right)+D\left(g\right)$ is an elementary process. In an experiment, the initial partial pressure of $A$ and $B$ are $P_A=0.6$ and $P_B=0.8$ atm when $P_C=0.2$ atm the rate of reaction relative to the initial rate is:

• A. $\frac{1}{48}$
• B. $\frac{1}{24}$
• C. $\frac{9}{16}$
• D. $\frac{1}{16}$

Answer 1

The correct option is D $\frac{1}{16}$

$⟹A\left(g\right)+2B\left(g\right)\to C\left(g\right)+D\left(g\right)$
$Att=00.60.800$
$Att=t(0.6-0.2)(0.8-2\times 0.2)0.20.2$

$Rat{e}_i=\left[0.6\right][0.8{]}^2$
$Rat{e}_t=\left[0.4\right][0.4{]}^2$
$\frac{Rat{e}_t}{Rat{e}_i}=\frac{1}{6}$