Gas laws are evident in a lot real world situations.
One such would be how hot air balloons are able to function.
Hot air balloons are used for travel and uses heat to help travel.
Charles's Law says as temperature increases, so does the volume and the kinetic energy of the gas molecules
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The air in the balloon begins to expand because hot air is less dense than cold air causing the balloon the rise
This says as the density of the air decreases as its temperature increases. So the heated air inside the balloon is less dense than the air outside of the balloon.
Charles's Law is directly related to this because as the temperature increases inside the balloon so does the volume
In colder temperatures helium balloons tend to be more deflated compared to a balloon in a warmer environment, this is because gases take up more space as temperature increases.
So because the air inside of the balloon is being heated, it becomes less dense and begins to expand lifting the balloon allowing it to travel.
Yay!
Thus when the air inside the balloon is cooled, it allows the balloon to descend back to the ground.