What happen when dilute sulphuric acid is a mixture of iron filling powder heated to red hot followed by cooling?

When dilute sulfuric acid is added to red-hot iron filings and then cooled, a chemical reaction occurs where the iron reacts with the acid to form iron(II) sulfate and hydrogen gas. The iron filings dissolve in the acid, producing a greenish solution, while hydrogen gas evolves as bubbles. Upon cooling, the iron(II) sulfate may crystallize out of the solution depending on its concentration.