Question

c2h2+2h2=c2h6
if the rate of appearance of c2h6 is 0.6 moles/dm³.sec what is rate of disappearance of h2 ?​

Answer 1

Answer:

Let 1 mole of ethane is passed over a suitable catalyst.

Let x moles of ethane dissociate to reach the equilibrium.

The equilibrium number of moles of ethane, ethylene and hydrogen are 1-x, x and x moles respectively

Explanation:

K  

p

​

=  

P  

ethane

​

 

P  

ethylene

​

P  

hydrogen

​

 

​

 

1−x

x  

2

 

​

=5×10  

−2

 

x  

2

+0.05x−0.05=0

x=  

2

−0.05+  

(0.05)  

2

+4×0.05

​

 

​

=0.20atm

The partial pressure of ethane is the product of mole fraction and total pressure.

0.80=mole fraction×1.2

Mole percentage of ethane =  

1.2

0.8

​

×100=66.66