A mixture of H2, S, and H2S is held in a 1.0 - L vessel at 90 oC and reacts according to the equation:

At equilibrium the mixture contains 0.46 g of H2S and 0.40 g H2.
(a) Write the equilibrium-constant expression for this reaction.
(b) What is the value of Kc for the reaction at this temperature?
(c) Why can we ignore the amount of S when doing the calculation in part (b)?

Transcribed Image Text:

H2(g) S(s)H2S(g)