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Rust forms when oxygen reacts with iron but simply putting iron and oxygen together isnt sufficient.
Rusting iron chemical change. Is a nail rusting a physical or chemical change. The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. The colour of the surface of the iron also changes in this reaction.
Rust is formed when iron reacts with oxygen in moist air. Rust is nothing but iron oxide. The colour of the surface of the iron also changes.
Rust is mostly made up of two different oxides of iron that vary in the oxidation state of the iron atom. A new substance formed out of the reaction. The underlying equation underlying rusting is Fe O2 H2O - Fe2O3 and because a new substance is created this is indeed a chemical change.
A more general term for rusting and other similar processes is corrosion. Iron Oxygen from environment Water Humidity Iron Oxide Rust. Strong metallic and covalent bonds are manifestly broken and new substances are manifestly formed and clearly this betokens chemical change.
The presence of oxygen and water or water vapor is essential for rusting. Rust is clearly a substance that is different from iron. Rust is nothing but Iron Oxide.
A chemical change is a reaction in which new substances are formed. 4Fe 3O2 g 2Fe2O3. Rusting is an example of a chemical change.
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