For the reaction, NH4HS (s) ⇌ NH3(g) + H2S (g), KP = 1225 (torr)2 In a vessel, NH3(g) at a partial pressure of 40 torr and H2S(g) at a partial pressure of 25 torr is taken. After a long time, the total pressure of gases in the vessel becomes

Engineering

Chemistry

Large or Small Equilibrium Constant Problems

Question

For the reaction,
NH₄HS (s) ⇌ NH₃(g) + H₂S (g), K_P = 1225 (torr)²
In a vessel, NH₃(g) at a partial pressure of 40 torr and H₂S(g) at a partial pressure of 25 torr is taken. After a long time, the total pressure of gases in the vessel becomes

70 torr

71.58 torr

less than 65 torr

65 torr

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No backward reaction, since Q_P < K_P . So pressure remained unchanged.