Question

When 5.1 g of solid NH₄HS is introduced into a two litre evacuated flask at 27°C, 20% of the solid decomposes into gaseous ammonia and hydrogen sulphide. The K_p for the reaction at 27°C is x × 10^–2 . The value of x is ........ (Integer answer)

[Given R = 0.082 L atm K^–1 mol^–1]

Answer 1

Answer is 6

moles of NH₄HS initially taken = \(\frac{5.1\,g}{51g\,mol}\) 

= 0.1 mol

volume of vessel = 2l

= 6.05 x 10^-2

⇒ 6