Is heating of iron wire physical or chemical change?

Answer 1

Since the chemical structure of the iron (Fe) does not change, it is a physical change. I would like to point out that this does make the likelihood that a chemical change will take place higher, more energy equals a faster phase transformation. If the iron it is sitting in air, the outer surface is likely under going a chemical change into iron oxide (FeO, Fe3O4, and Fe2O3) more commonly known as rust. Hence, iron as with most metals is found as Iron oxide and processed into Iron. More facts about iron can be found here: http://en.wikipedia.org/wiki/Iron

Answer 2

Mixing elemental iron and elemental sulfur is actually physical, but the mixture stays heterogenous. The particles of iron do not interchange with those of the sulfur.

If they were to be melted and alloyed then it would be a physical change, but this is not reality:

In stead they react (chemically!) when heated to form ferrous sulfide, FeS, which is a totally new compound.

Fe + S --> FeS

Answer 3

depends...this is physical science so if you mely them together it would be a chemical change but seperatly itd be a physical change

Answer 4

Heating is a physical process.

Answer 5

A physical change

Answer 6

physical

Answer 7

both

Answer 8

Physical change