(Multiple choice)

(1)

If the temperature of an ideal gas is doubled while maintaining constant pressure, the average speed of the molecules 

(a) Remains constant. 

(b) Increases by a factor of 4. 

(c) Increases by a factor of 2. 

(d) Increases by a factor of √2

(2)

If both temperature and volume of an ideal gas are halved, the pressure 

(a) Diminishes by a factor of 2

(b) Remains constant. 

(c) Increases by a factor of 2. 

(d) Diminishes by a factor of √2

(3)

The average translational kinetic energy of the molecules of an ideal gas depends on 

(a) The number of moles of the gas and its temperature. 

(b) The pressure of the gas and its temperature. 

(c) The pressure of the gas only. 

(d) The temperature of the gas only.

(4)

If a vessel contains equal amounts, by weight, of helium and argon, which of the following are true? 

(a) The pressure exerted by the two gases on the walls of the container is the same. 

(b) The average speed of a helium atom is the same as that of an argon atom. 

(c) The number of helium atoms and argon atoms in the vessel are equal. 

(d) None of the above statements is correct.

(5)

Oxygen has a molar mass of 32 g/mol, and nitrogen has a molar mass of 28 g/mol. The oxygen and nitrogen molecules in a room have 

(a) Equal average kinetic energies, but the oxygen molecules are faster. 

(b) Equal average kinetic energies, but the oxygen molecules are slower. 

(c) Equal average kinetic energies and speeds. 

(d) Equal average speeds, but the oxygen molecules have a higher average kinetic energy. 

(e) Equal average speeds, but the oxygen molecules have a lower average kinetic energy. 

(f) None of the above is correct.