Science
Charles's law.
Definition
Charles's law states that the volume of a gas is directly proportional to its absolute temperature when pressure and the amount of gas are held constant. Heating a gas causes it to expand; cooling causes it to contract.
Examples
Real-world.
- 1 A hot-air balloon rises because heating the air inside increases its volume and decreases its density
- 2 A basketball left outside in winter appears deflated because the cold air inside contracts
- 3 Bread dough rises faster in a warm oven as gas bubbles inside expand
Key Fact
V₁/T₁ = V₂/T₂ (temperature must be in Kelvin)