Brainlag PlusParticles moving at random, what pressure is, why a hotter gas in a sealed container has a higher pressure, and the kelvin scale.
Pressure from collisions
The particles in a gas move constantly in random directions at a range of speeds.
Each time one hits a wall it exerts a small force. Pressure is the total force of all these collisions on each unit of area.
The temperature of a gas is linked to the average kinetic energy of its particles: hotter means faster on average.
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 4, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- The Gas laws simulation beside every question
- Anything you get wrong is saved to your flashcards