Q.

NH4HS(s)⇌NH3(g)+H2 S(g) the equilibrium Pressure at 25oC is 0.660 atm. what is K p for the reaction?

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0.109

0.218

1.89

2.18

answer is A.

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Detailed Solution

NH4HS(s)⇌NH3(g)+H2S(g)t = 0; a mole 0 0teq. ; a-x x xn = x + x =2x∵PGas =XGas ·PTotal ⇒PNH3=12×0.66=0.33 atm PH2 S=12×0.66=0.33 atm Now kp=PNH31PH2 S1=0.33×0.33

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