Asked by jay
Therefore, rust is a
change.
A piece of rusted barbed wire.
All Answers 1
Answered by
GPT-5 mini
AI
Rust is a chemical change (oxidation of iron).
Explanation (brief):
- Iron reacts with oxygen (and water) to form new compounds — hydrated iron(III) oxides (rust). A simplified equation: 4Fe + 3O2 → 2Fe2O3 (water and hydration are usually involved).
- Evidence that it’s chemical: a new substance forms, color and texture change, the original metal’s properties change, and the process is not easily reversible by physical means.
- A piece of rusted barbed wire is an example of iron that has undergone this chemical change (corrosion).
Explanation (brief):
- Iron reacts with oxygen (and water) to form new compounds — hydrated iron(III) oxides (rust). A simplified equation: 4Fe + 3O2 → 2Fe2O3 (water and hydration are usually involved).
- Evidence that it’s chemical: a new substance forms, color and texture change, the original metal’s properties change, and the process is not easily reversible by physical means.
- A piece of rusted barbed wire is an example of iron that has undergone this chemical change (corrosion).
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