Ideal gas

So, imagine you have a bunch of little balls bouncing around in a room. They're all moving around really fast and hitting into each other and the walls. These little balls represent gas molecules.

Now, an ideal gas is a special kind of gas where the molecules are very small and don't have any forces between them, so they can bounce around and move freely without sticking together or anything like that.

We can describe how these little gas molecules are moving using something called the "ideal gas law." This law tells us that the pressure (or how hard the gas is pushing on the walls of the room), the volume (or how much space the gas is taking up), the temperature (how hot or cold the gas is), and the number of gas molecules are all related to each other in a certain way.

Scientists like to study ideal gases because they're easy to work with mathematically and they help us understand how real gases behave in different situations.