Uses of Metals: Aluminium & Copper
Chemistry: Cambridge International GCSE Supplement, topic 9.2.1
Uses of Metals: Aluminium and Copper
Metals' physical properties make it useful in aircraft, cables, food containers, and wiring.
Aluminium's low density and aircraft manufacture
- Aluminium has a low density compared to many metals.
- Low density makes aluminium light, ideal for aircraft construction.
- Using aluminium helps aircraft use less fuel and fly efficiently.
Aluminium in overhead electrical cables
- Aluminium's low density reduces the weight of overhead cables.
- Aluminium conducts electricity well, almost as well as copper.
- These properties make aluminium perfect for long overhead electrical cables.
- Lighter cables are easier to support on poles and towers.
Aluminium in food containers
- Aluminium resists corrosion, meaning it does not react easily with air or food.
- This resistance keeps food safe and fresh inside containers.
- Aluminium is resistant to corrosion because of the impervious coating of Al₂O₃.
- Metal does not rust like iron, making aluminium better for containers.
Copper in electrical wiring
- Copper has excellent electrical conductivity, better than aluminium.
- Copper wires easily bend without breaking, showing great ductility.
- Copper wires efficiently carry electricity in homes and electronics.
Summary of uses related to physical properties
- Aluminium's low density helps in aircraft and cables.
- Aluminium's corrosion resistance suits food containers.
- Copper's conductivity and ductility make it ideal for wiring.
Test yourself on Uses of Metals: Aluminium & Copper
What physical property makes aluminium particularly suitable for the manufacture of aircraft?
Using aluminium for overhead electrical cables provides what practical benefit?