Charles law states that if the volume of a gas is kept constant, the pressure of the gas is directly proportional to the temperature. Which suggests that in an ideal situation where the volume does not change, if either the pressure or temperature is increased the other one will increase by the same proportion.
A few very interesting examples regarding Charles Law in everyday life are discussed below:
It can be observed that when you use a pressure deodorant can of any sort and spray for a few seconds, the can tends to become cooler. This is a perfect example of Charles Law. When you spray the can, the liquid spray of the can is released hence decreasing pressure inside it a bit. Since the can’s volume does not change the temperature falls showing the fact that with the decrease in pressure the temperature falls proportionally.
Ping Pong Balls
Little children come up with ingenious ways of mending their toys. One of them is removing the dent from a ping pong ball.
When a ping pong ball gets dented without being punctured the best solution is to dip it for a while in warm water. Since the air inside the ball tries to match the temperature of the water outside, pressure builds up as a result popping the dented part back into place. This shows how an increase in temperature caused a proportional increase in pressure according to Charles Law.
Exploding beer/soda cans
Beer or soda cans and bottles have a label on them stating “Store in a cool, dry place”. The reason being that these cans have a lot of artificial pressure stored in them. When exposed to direct sunlight/heat, the pressure inside the cans rise. However since the volume is constant the pressure increases to a limit where they burst, letting out all the pressure. The temperature increase in the can resulted in the increase in pressure resulting in the explosion.
Inflated football deflates in winter
Try inflating a football indoors on a chilly winter day. When playing outside it will be noticed that the football seems deflated. This is because of the change in temperature from the warm indoors to the chilly outdoors.
When the ball was brought outside the temperature dropped and proving Charles law, the pressure of the air inside the ball dropped too, making the ball seem deflated.
Popping party balloons
During outdoor parties a common nuisance is having to replace popped party balloons. When the air inside the balloon heats up due to the sun they pop due to increased pressure.