A sample of iron(ii) sulfate was heated in an evacuatedcontainer to 920K, where

Question

A sample of iron(ii) sulfate was heated in an evacuatedcontainer to 920K, where the following reactionsoccurred:
2FeSO4(s) <=> Fe2O3(s) +SO3(g) + SO2(g)
SO3(g) <=> SO2(g) + 1/2 O2(g)
After equilibrium was reached, the total pressure was 0.836atm and the partial pressure of oxygen ws 0.0275 atm.

What is the single chemical reaction for the complete two step process.



Write an expression for the equilibrium constant for the two step process in terms of the equilibrium constants for the individual steps.



Write an expression for the equilibrium constant for the overall reaction in terms of the partial pressures of the reactants and products.



What is the value of the equilibrium constant at 929 K?

Explanation / Answer

a) 2FeSO4(s) Fe2O3(s) +2 SO2(g) + 1/2 O2(g) b)Knet=K1*K2 c)Knet=(pSO2)^2 *p(O2)^(1/2)

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