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Standard X

Chemistry

Factors Affecting the Rate of a Chemical Reaction

The reaction ...

Question

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 $P_{A} = 0.60$ atm and $P_{B} = 0.80$ atm. When $P_{C} = 0.2$ atm the rate of reaction relative to the initial rate is:

1/48

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1/24

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1/6

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Solution

The correct option is D 1/6
$R_{1} = k [A] [B]^{2} = k [0.6] [0.80]^{2}$ ---- 1
After reaction $A + 2 B \to C + D$
0.6-0.2 0.8-0.4 0.2 0.2
0.4 0.4 0.2 0.2
$R_{2} = k [0.4] [0.4]^{2}$ ---- 2
From 1 and 2 equation,

$\frac{R_{2}}{R_{1}} = \frac{k [0.4] [0.4]^{2}}{k [0.6] [0.8]^{2}} = \frac{1}{6}$ .

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The reaction A(g)+2B(g)→C(g)+D(g) is an elementary process. In an experiment, the initial partial pressure of A and B are PA=0.60 atm and PB=0.80 atm. When PC=0.2 atm the rate of reaction relative to the initial rate is:

The correct option is D 1/6R1=k[A][B]2=k[0.6][0.80]2 ---- 1After reaction A+2B→C+D 0.6-0.2 0.8-0.4 0.2 0.2 0.4 0.4 0.2 0.2R2=k[0.4][0.4]2 ---- 2From 1 and 2 equation,R2R1=k[0.4][0.4]2k[0.6][0.8]2=16.

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 $P_{A} = 0.60$ atm and $P_{B} = 0.80$ atm. When $P_{C} = 0.2$ atm the rate of reaction relative to the initial rate is:

The correct option is D 1/6
$R_{1} = k [A] [B]^{2} = k [0.6] [0.80]^{2}$ ---- 1
After reaction $A + 2 B \to C + D$
0.6-0.2 0.8-0.4 0.2 0.2
0.4 0.4 0.2 0.2
$R_{2} = k [0.4] [0.4]^{2}$ ---- 2
From 1 and 2 equation,

$\frac{R_{2}}{R_{1}} = \frac{k [0.4] [0.4]^{2}}{k [0.6] [0.8]^{2}} = \frac{1}{6}$ .