heating a mixture of iron and sulfur is it chemical or physical

Heating a mixture of iron and sulfur is a chemical change.

To determine whether a change is chemical or physical, we can consider the fundamental properties of matter. In a chemical change, the substance(s) involved undergo a chemical reaction, resulting in the formation of new substances with different properties. A physical change, on the other hand, does not result in the formation of new substances; it only alters the physical properties of the materials involved, such as size, shape, or state.

In this case, when iron and sulfur are heated together, a chemical reaction occurs, resulting in the formation of iron sulfide. Iron and sulfur atoms combine to form a new compound with entirely different properties. The reaction can be represented by the chemical equation:

Iron + Sulfur → Iron Sulfide

So, heating the mixture of iron and sulfur is a chemical change.