Thermal

Question 1

State three assumptions made about the motion of gas molecules in the derivation of the kinetic theory of gases equation

Answer 1

Molecules move in random motion, collisions of molecules with each other and with the walls are elastic, time in contact is small compared to time between collisions

Question 2

Give two units of mean square speed

Answer 2

m^2s^2, Jkg^-1

Question 3

Define an ideal gas

Answer 3

Gas which follows Boyle’s law at all temperatures and pressures

Question 4

What is the formula for number of moles?

Answer 4

Total number of molecules / Avogadros constant

Question 5

Define isothermal

Answer 5

Constant temperature

Question 6

Define isobaric

Answer 6

Constant pressure

Question 7

What does Brownian motion show

Answer 7

Motion of particles in a container caused by them experiencing forces due to collisions with molecules which change its magnitude and direction of velocity at random