Question

What will be the composition of gases obtained by burning pure iron pyrates with excess air?

Answer 1

Answer:

Iron pyrites (FeS2) is burned with  air  in 100% excess of that required to oxidize all iron to Fe2O3 and all sulphar dioxide .Calculate the  composition of the exit gases,if 80% of sulphur is oxidized to sulphar trioxide and 't' rest to sulphar dioxide .All iron is oxidized to Fe2O3

Answer 2

The gases obtained by burning pure iron pyrites with excess air are Sulphur Dioxide (SO2), Sulphur Trioxide (SO3), Oxygen (O2) and Nitrogen (N2).

- When Iron pyrite (FeS2) is burned in excess air then Fe2O3 (which is a solid) and SO2 gas are produced mainly.

- Some of this SO2 gas is further oxidised to SO3 (as air is in excess).

- Apart from these gases, O2 and N2 from air are also mixed with the gases formed.

- SO the final composition of gases becomes : SO2, SO3, O2 and N2