Q.

At constant pressure P, A dissociates on heating according to the equation                 A(g)⇌B(g)+C(g) The equilibrium partial pressure of A at T K is 19P , the equilibrium constant Kp  at T K is

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a

89P

b

649P

c

169P

d

9P

answer is C.

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Detailed Solution

PB=PC PA+PB+PC=P ⇒          PB+PC=P−19P=89P ∴            PB=PC ∴            PB=PC=12×89P=49P Kp=PB×PCPA ⇒ Kp=49P×49P19P=169P
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At constant pressure P, A dissociates on heating according to the equation                 A(g)⇌B(g)+C(g) The equilibrium partial pressure of A at T K is 19P , the equilibrium constant Kp  at T K is