Question
Explain the concept of chemical reactions with two examples.
✓
Answer
→ A chemical reaction is a process where one or more substances (reactants) are converted into new substances (products).
→ This involves the breaking and forming of chemical bonds.
Chemical reactions are usually irreversible, meaning you can't easily go back to the original substances.
Example:
1.Burning Wood
Reactants: Wood (primarily carbon compounds) and Oxygen O2 in the air.
Process: When you light a fire, the wood combines with oxygen in a process called combustion.
Products: Carbon Dioxide CO2,Water H2O,Ash, and Heat/Light.
Explanation: The wood is changed into completely different substances (gases and ash), and you can't turn the ash and gases back into wood.
2.Rusting of Iron
Reactants: Iron (Fe), OxygenO2 and Water H2O
Process: Over time, iron reacts with oxygen and water in the air.
Product: Rust (Iron Oxide, Fe2O3)
Explanation: The shiny iron metal turns into a reddish-brown, flaky substance (rust). The original iron has been transformed into a new compound, and you can’t simply turn the rust back into iron.
→ This involves the breaking and forming of chemical bonds.
Chemical reactions are usually irreversible, meaning you can't easily go back to the original substances.
Example:
1.Burning Wood
Reactants: Wood (primarily carbon compounds) and Oxygen O2 in the air.
Process: When you light a fire, the wood combines with oxygen in a process called combustion.
Products: Carbon Dioxide CO2,Water H2O,Ash, and Heat/Light.
Explanation: The wood is changed into completely different substances (gases and ash), and you can't turn the ash and gases back into wood.
2.Rusting of Iron
Reactants: Iron (Fe), OxygenO2 and Water H2O
Process: Over time, iron reacts with oxygen and water in the air.
Product: Rust (Iron Oxide, Fe2O3)
Explanation: The shiny iron metal turns into a reddish-brown, flaky substance (rust). The original iron has been transformed into a new compound, and you can’t simply turn the rust back into iron.
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