Lecture 26 Flashcards
Explain the 5 behaviours of an ideal gas
- Particles are in random motion
- Negligible particle volume
- Particles collide with each other, and container walls
- Particles move independently, and experience interparticle forces
- Constant total energy (energy transferred but KE is conserved)
In an ideal gas, what is the KE directly proportional to?
Temperature
Why do particles move at different speeds
Because of collisions
When a particle hits the wall what does it exert
Momentary pressure
On average what makes particles move faster (high Urms)
If they are light (small M) and if temperature is high (large T)
What does temperature measure
The degree of random motion
Higher T = greater KE = greater motion
What does temperature mean for one particle
- temperature only makes sense on the macroscopic level
- doesn’t make sense to define temperature of a single particle
What does zero temperature mean
All molecular motion would stop at absolute zero
All gases condense to solids or liquids below zero
What happens to distribution at higher temperatures
It widens
What conditions would you expect for ideal behaviour
Low P, high T
What conditions would you expect for non-ideal behaviour
High P, low T
