The reaction,Ag+2Bg→Cg+Dg is an elementary process . In an experiment, the initial partial pressure of A and B are PA=0.60 and PB=0.80 atm. When PC=0.2 atm the rate of reaction relative to the initial rate is

The reaction, $A_{(g)} + 2 B_{(g)} \to C_{(g)} + D_{(g)}$ is an elementary process . In an experiment, the initial partial pressure of A and B are $P_{A} = 0.60 and P_{B} = 0.80 atm . When P_{C} = 0.2 atm$ the rate of reaction relative to the initial rate is

A
1/48
B
1/24
C
9/16
D
1/6

Solution:

$A + 2 B \to C + D$

initial: 0.6 0.8 0 0

after 't' time:0.4 0.4 0.2 0.2

$r_{1} = K . P_{A}^{1} \times P_{B}^{2} = K \times 0.6 \times 0.8 \times 0.8$ $r_{2} = K \times P_{A}^{1} \times P_{B}^{2} after' t' time$

$r_{2} = K \times 0.4 \times 0.4 \times 0.4$

$\frac{r_{2}}{r_{1}} = \frac{K \times 0.4 \times 0.4 \times 0.4}{K \times 0.6 \times 0.8 \times 0.8} = \frac{1}{6}$

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