Pyrite (FeS2) is often roasted to obtain sulfur dioxide for making sulfuric acid. Consider the roasting reaction FeS2 + O2 = Fe2O3 + SO2 Stoichiometric exercises: a) Formulate the correct stoichiometric roasting reaction Calculate, in respect to 1 t of pyrite, the stoichiometric amounts of b) Oxygen required for roasting (in m3) c) Obtained hematite by-product (in t) d) Sulfur dioxide produced (in m3
Pyrite (FeS2) is often roasted to obtain sulfur dioxide for making sulfuric acid. Consider the roasting reaction
FeS2 + O2 = Fe2O3 + SO2
Stoichiometric exercises:
a) Formulate the correct stoichiometric roasting reaction
Calculate, in respect to 1 t of pyrite, the stoichiometric amounts of
b) Oxygen required for roasting (in m3)
c) Obtained hematite by-product (in t)
d) Sulfur dioxide produced (in m3)
e) Calculate the reaction enthalpy ∆H
o
298 for the above roasting reaction (in MJ/t of pyrite)
Mind you: Requested is the reaction enthalpy per 1 t of pyrite!
f) State whether the reaction is exo- or endothermic and say why.
g) Calculate the actual change of entropy ∆S
o
298 in J/(mol K) and explain why it is positive or negative
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