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It is a chemical change. Here oxidation of Iron occurs and being oxidation reaction, it is 'exothermic' reaction.Through it takes prolonged period and it is difficult to observe it, you can deduct it. As 'all' oxidation reactions are 'exothermic'.
What else can I help you with?
Is etching glass with acid a chemical or physical change?
It is a physical change caused by chemicals. Chemical changes are phyiscal changes.
What are facts about physical and chemical change?
Chemical changes take place on the molecular level
Is wood rotting a chemical change or physical change?
it is a chemical reaction because a new substance is formed when the wood rots
Difference between chemical and physical change?
A chemical change is when the chemical properties of a substance changes and a physical change is when the chemical properties stay the same but the physical properties (shape, temperature etc...)
If you crumple a piece of paper into a ball is the change physical or chemical?
it is a physical change
Is a rusting bicycle a chemical changes or a physical change?
physical change
is a bicycle a chemical or physical change?
Rust (oxidation of metal) is a chemical change but it is also a physical change in the strength of the material.
Is a rusting bicycle a physical change or a chemical change?
physical change
Are all physical changes accompanied by chemical changes?
Not all chemical changes are accompanied by a visible physical change. Most chemical changes however will be accompanied by a physical change.
Is bleaching your hair Is a rusting bicycle a physical or chemical change?
first physical, second chemical
Is rusting a bicycle a chemical or physical change?
Rust (oxidation of metal) is a chemical change but it is also a physical change in the strength of the material.
Are all physical changes accompanied by a chemical change?
A physical change is a change in chemical composition. A physical change is a change where chemical composition is not altered. Not all chemical changes are accompanied by a physical change, but some are. The same is true for the reverse.
Is a rusting bicycle a chemical or physical?
Rust (oxidation of metal) is a chemical change but it is also a physical change in the strength of the material.
Is reacting a physical change or chemical change?
Reacting can involve both physical changes and chemical changes. Physical changes involve alterations in the physical state of a substance without changing its chemical composition, while chemical changes involve the formation of new substances with different chemical compositions.
Is etching glass with acid a chemical or physical change?
It is a physical change caused by chemicals. Chemical changes are phyiscal changes.
Are phrase changes a chemical or physical change?
Physical change
If water is boiling is it a chemical change or a physical change?
It is a physical change. All phase changes are physical, not chemical. The chemical composition of water does not change when it changes from a liquid to a gas, or for that matter, to a solid.
