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Grade: 11
        

At  90°C ,  the  following  equilibrium  is  established  : H2 (g) + S(s) = H2 S(g)     Kp  = 6.8 × 10 ^2 .


If   0.2 mol  of  hydrogen  and  1.0 mol  of   sulphur  are  heated  to  90°C  in  a  1.0  litre  vessel, what  will  be  the partial  pressure of  H2 S  at  equilibrium?

7 years ago

Answers : (2)

Arpit Jaiswal
31 Points
							

given,

H2 (g) +    S(s)      = H2 S(g)     Kp  = 6.8 × 10 ^2 

int. moles     0.2          1.0           ----

final moles   (0.2-x)    (1.0-x)        x

total moles are 1.2-x

therefore, from Kp equation we have-

6.8 x 10^2  =                   [x/(1.2-x) * 1]              

[(0.2-x)/(1.2-x)*1][(1-x)/(1.2-x)*1]

solving the above quadratic, we get- x

now partial pressure of H2 S is  (x/1.2-x)*1

which is the required answer

hope this helps

AJ

 

 

7 years ago
ankitesh gupta
63 Points
							

 

 

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7 years ago
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