? K p = K p = than reactants. In principle, this reaction is a feasible method t

Question

?

Kp =

Kp =

than reactants. In principle, this reaction is a feasible method to remove SO2, however, H2S is a highly toxic gas that reduces the oxygen-carrying capacity of the blood. Its use would pose a safety hazard for plant workers and people in the nearby area. The reaction SO2(g) + 2H2S(g) 3S(s) + 2H20(g) is the basis of a suggested method for removal of ? Part C SO2, a pollutant that irritates airways causing coughing, from power-plant stack gases Assume that the partial pressure of sulfur dioxide, Po, , is equal to the partial pressure of dihydrogen sulfide. ??? and therefore Pso2 PH2s. If the vapor pressure of water is 27 torr, calculate the equilibrium partial pressure of SO2 (Pso2 ) In the system at 298 K. Express the pressure in atmospheres to two significant figures. The values below may be helpful when answering questions about the process AG substance (kJ/mol) (kJ/mol) H20(g)228.62418 H20-237.1-285.8 SO2(g)300.4296.3 SO3(g-370.4395.2 H2S(g-33.01-20.17 View Available Hint(s) -296.9 Pso2 - atm Submit X Incorrect; Try Again; 3 attempts remaining

Explanation / Answer

Kp = 8 x 10^15

SO2 (g) + 2 H2S (g)   <-------------> 3 S (s) + 2 H2O (g)

Kp = P2H2O / PSO2 x P2H2S

PH2O = 27 torr = 0.0355 atm

PSO2 = P H2S = x

8 x 10^15 = (0.0355)^2 / x^3

X = 5.40 x 10^-7

Partial pressure of SO2 = 5.4 x 10^-7 atm

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