Practise explaining how temperature at fixed volume or volume at fixed temperature changes gas pressure through particle speed, momentum and wall collisions.
The temperature of a fixed mass of gas at constant volume changes from 300 K to 400 K .
State and explain, in terms of particles, the effect on the pressure of the gas.
statement
explanation
increased (pressure)
B1
particles of gas move faster OR have more KE / momentum / velocity
B1
any two from from:
- more frequent collisions of particles (with walls)
- particles collide (with walls) with a larger force OR larger impulse
- (greater change in momentum of particles) causes greater force (on walls)
- pressure = force / area
B2