Ammonium hydrogen sulfide (NH4SH) was detected in the atmosphere of Jupiter subs

Question

Ammonium hydrogen sulfide (NH4SH) was detected in the atmosphere of Jupiter subsequent to its collision with the comet Shoemaker-Levy. The equilibrium between ammonia, hydrogen sulfide, and NH4SH is described by the following equation: NH4SH(s)NH3(g)+ H,S(g) 1st attempt lld See Periodic Table See Hint s 0.126 Suppose a seattial pressure of NH,? The value of Kp for the reaction at 24°C is 0.126. Suppose a sealed flask contains a mixture of solid NH4SH and gaseous NH3 and H2S at equilibrium. At equilibrium, the partial pressure of H2S is 0.355 atm. What is the partial pressure of NH3? atm

Explanation / Answer

consider the given equilibrium

NH4SH (s) <--> NH3 (g) + H2S (g)

the expression for Kp is given by

Kp = (pNH3) (pH2S)

note: pure solids and liquids can be ignored

given

Kp = 0.126

pH2S = 0.355

so

0.126 = (pNH3) (0.355)

pNH3 = 0.126 / 0.355

pNH3 = 0.35493 atm

so

the partial pressure of NH3 will be 0.35493 atm

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