Question

"The combustion of ethylene proceeds by the reaction C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) When the rate of disappearance of O2 is 0.23 M s-1, the rate of disappearance of C2H4 is ________ M s-1."

Answer 1

Answer:

The rate of  disappearance of $C_2H_4$ is 0.0766 M/s.

Explanation:

$C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(g)$

Rate of the reaction = R

$R=-\frac{1}{1}\frac{d[C_2H_4]}{dt}=-\frac{1}{3}\frac{d[O_2]}{dt}$

[te]R=\frac{1}{2}\frac{d[CO_2]}{dt}=\frac{1}{2}\frac{d[H_2O]}{dt}[/tex]

Rate of disappearance of $O_2$ =0.23 M/s

Rate of disappearance of $O_2=3\times R$

$0.23 M/s=3\times R$

R =0.07666 M/s

Rate of disappearance of $C_2H_4=1\times R$

$\frac{d[C_2H_4]}{dt}=1\times 0.23 m/s=0.0766 M/s$

The rate of  disappearance of $C_2H_4$ is 0.0766 M/s.