Linked from
The 13 pages that link to Charles's law, each with the reason it gives.
Ideal gasBroader topic: It is an ideal-gas prediction for heating a gas under constant pressure.
Montgolfier brothersRelated: Heating the air expands it and lowers its density inside the balloon.
Gas lawsBroader topic: Shows how heating changes volume when pressure is held constant.
GasRelated: Heating a gas increases its volume when pressure is held constant.