EASY
AS and A Level
IMPORTANT
Earn 100
Air consists of molecules of oxygen (molar mass ) and nitrogen (molar mass ). Calculate the mean translational
k.e. of these molecules in air at . Use your answer to calculate the root-mean-square speed of each type of molecule.
Important Questions on Ideal Gases
EASY
AS and A Level
IMPORTANT
Show that the change in the internal energy of one mole of an ideal gas per unit change in temperature is always a constant. What is this constant?
EASY
AS and A Level
IMPORTANT
Without looking at your textbook, make a list of the kinetic theory equations and write down what each term in the equations means.
EASY
AS and A Level
IMPORTANT
Write out a proof on your own of the main kinetic theory equation using momentum change and Newton's laws.
EASY
AS and A Level
IMPORTANT
Write out the assumptions for kinetic theory of ideal gases in your own words.
EASY
AS and A Level
IMPORTANT
Show how kinetic theory relates temperature and molecular speed.
EASY
AS and A Level
IMPORTANT
What things might you want more help with?
EASY
AS and A Level
IMPORTANT
A gas is enclosed inside a cylinder that is fitted with a freely moving piston. The gas is initially in equilibrium with a volume and a pressure . The gas is then cooled slowly. The piston moves into the cylinder until the volume of the gas is reduced to and the pressure remains at . What is the work done on the gas during this cooling?
EASY
AS and A Level
IMPORTANT
Relate workdone and energy for an ideal gas is made to expand slowly at a constant temperature.
