Question & Answer: The reaction SO2(g)+2H2S(g)⇌3S(s)+2H2O(g) is the basis of a suggested method for removal…..

The reaction

SO2(g)+2H2S(g)⇌3S(s)+2H2O(g)

is the basis of a suggested method for removal of SO2, a pollutant that irritates airways causing coughing, from power-plant stack gases.

The values below may be helpful when answering questions about the process.

Substance ΔG∘f
(kJ/mol)
ΔH∘f
(kJ/mol)
H2O(g) −228.6 −241.8
H2O(l) −237.1 −285.8
SO2(g) −300.4 −296.9
SO3(g) −370.4 −395.2
H2S(g) −33.01 −20.17
S(s) 0 0
Kp = 8×1015

Assume that the partial pressure of sulfur dioxide, PSO2, is equal to the partial pressure of dihydrogen sulfide, PH2S, and therefore PSO2=PH2S. If the vapor pressure of water is 28 torr , calculate the equilibrium partial pressure of SO2 (PSO2) in the system at 298 K.

Expert Answer

Answer

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