The combustion of ethylene proceeds by the reaction
$\mathrm { C } _ { 2 }$ $\mathrm { H } _ { 4 }$ (g) + $3 \mathrm { O } _ { 2 }$ (g) ? $2 \mathrm { CO } _ { 2 }$ (g) + $2 \mathrm { H } _ { 2 }$ O(g)
When the rate of disappearance of $\mathrm { O } _ { 2 }$ is 0.37 mol L^-1 $s ^ { - 1 }$ ,the rate of appearance of $\mathrm { CO } _ { 2 }$ is ________ $\mathrm { mol } \mathrm { L } ^ { - 1 } \mathrm {~s} ^ { - 1 }$

Question

The combustion of ethylene proceeds by the reaction

\mathrm { C } _ { 2 }

\mathrm { H } _ { 4 }

(g) +

3 \mathrm { O } _ { 2 }

(g) ?

2 \mathrm { CO } _ { 2 }

(g) +

2 \mathrm { H } _ { 2 }

O(g)
When the rate of disappearance of

\mathrm { O } _ { 2 }

is 0.37 mol L^-1

s ^ { - 1 }

,the rate of appearance of

\mathrm { CO } _ { 2 }

is ________

\mathrm { mol } \mathrm { L } ^ { - 1 } \mathrm {~s} ^ { - 1 }

Quizplus · Accepted Answer

The stoichiometry of the reaction shows that 3 moles of $O_2$ produce 2 moles of $CO_2$. Therefore, the rate of appearance of $CO_2$ is $\frac{2}{3}$ of the rate of disappearance of $O_2$. Thus, $\frac{2}{3} \times 0.37 = 0.2467 \approx 0.25$ mol L$^{-1}$ s$^{-1}$.

The Combustion of Ethylene Proceeds by the Reaction C2\mathrm { C } _ { 2 }C2​

The Combustion of Ethylene Proceeds by the Reaction $\mathrm { C } _ { 2 }$