Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction
NH4HS(s)⇌NH3(g)+H2S(g)
This reaction has a Kp value of 0.120 at 25 ∘C.
What is the initial pressure of H2S(g) in the flask?

Question

Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction
NH4HS(s)⇌NH3(g)+H2S(g) 
This reaction has a Kp value of 0.120 at 25 ∘C.
What is the initial pressure of H2S(g) in the flask?

anonymous · Answer

0.065

anonymous · Answer

PV=nRT=mRT/M --> P=mRT/MV=0.45g*0.082(atm·l/K·mol)*298 K/ 34 (g/mol)*5 l= 0.065 atm