Le Chatelier introduced excess solid N H 4 HS into a closed 5.0 L vessel containing N H 3 at a partial pressure of P mm and temperature 300 K. The solid dissociates. At equilibrium, the partial pr

Question

Le Chatelier introduced excess solid N H 4 ​ HS into a closed 5.0 L vessel containing N H 3 ​ at a partial pressure of P mm and temperature 300 K. The solid dissociates. At equilibrium, the partial pressure of N H 3 ​ is 625 mm and the total pressure of gases is 725 mm. K p ​ for the reaction: N H 3 ​ (g) + H 2 ​ S (g) ⇌ N H 4 ​ HS (s), is ​

TestHub · Accepted Answer

For the reverse reaction NH 4 ​ HS(s) ⇌ NH 3 ​ (g) + H 2 ​ S(g) K p ​ ’ = P NH3 ​ × P H2S ​ = 625 × 100 = 6.25 × 10 4 mm 2 For the given reaction, K p ​ = 1/K p ​ ’ K p ​ = 1/(6.25 × 10 4 ) = 1.6 × 10 -5 mm -2 This is option (b). ​

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