Understanding Ideal Gas Behaviour
Ever wondered why a balloon shrinks in cold weather or why a bike pump gets hot when you use it? The ideal gas equation explains it all: PV = NkT. This powerful formula connects pressure (P), volume (V), number of molecules (N), and temperature (T) through Boltzmann's constant .
Real gases behave like ideal gases under normal conditions because molecules follow five key assumptions. Particles move randomly and continuously, don't attract each other, and take up negligible space compared to their container. Most importantly, collisions are elastic - no kinetic energy gets lost when molecules bounce around.
Quick Tip: Remember that temperature in the ideal gas equation must always be in Kelvin, not Celsius!
The kinetic theory brilliantly explains pressure changes. When you decrease volume, more molecules hit the container walls per second, increasing pressure. Similarly, heating a gas makes molecules move faster, creating more forceful collisions and higher pressure.
