What is the result of Iron and sulfur when heated?

Question

What is the result of Iron and sulfur when heated?

Answer 1

There are two options for the products depending on the relative amounts of powdered iron and sulfur.

Fe(s) + S(s) -->  FeS(s)

or

2Fe(s) +  3S(s)  --> Fe2S3(s)

With a limited amount of sulfur compared to iron it goes to the lower oxidation state, FeS.

With an excess of sulfur it goes to the higher oxidation state, Fe2S3.

Answer 2

Iron sulfide. See interesting quick time movie at:

http://jchemed.chem.wisc.edu/jcesoft/CCA...