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Grade: 12th pass
        If in an evacuated vessel of volume 1cubic dm initially 8 moles of AB3(g) are taken and at equilibrium two moles of A2(g) are present then find out Kc: 2AB3(g)(irreversible reaction) A2(g)+3B2(g)
10 months ago

Answers : (1)

Chhavi Jain
92 Points
							
Dear student ,
 
The rxn given is :
 
                                 2 AB3(g)       ---------->        A2(g)  +    3  B2(g)
 
                       t=0    8 moles                               –                  –        
                     
                t= eqbm   8 – x                                x/2                 3x/2
 
Given :  At eqbm.  2 moles of A2 are present  ;   x/2= 2  => x=4
 
 
 
                       Kc  =   [AB3]2  /   [A2] [ B2]3
 
Volume of vessel = 1 cubic dm = 1 L  ;   conc. = moles / vol  ;  So, conc = moles /1
 
So,                  Kc =  ( 4)2  /  (2) * (6)3
 
                        K=  0.037  mol-2 L2
 
Chemistry Consultant
Askiitians      
 
 
 
 
10 months ago
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