how did the experiment with the iron filings and sulfur compare with the experiment in which copper(ii)…

how did the experiment with the iron filings and sulfur compare with the experiment in which copper(ii) sulfate pentahydrate was heated?\nboth resulted in gas formation.\nboth resulted in color change.\nboth involved chemical change.\nboth involved physical change.\none involved chemical change while the other involved physical change.
Answer
Brief Explanations:
When iron filings react with sulfur, a chemical reaction occurs to form iron sulfide. Heating copper(II) sulfate pentahydrate causes it to lose water of crystallization and form anhydrous copper(II) sulfate, which is also a chemical change.
Answer:
Both involved chemical change.