A level: Kinetic Theory Questions

Q13.

(a) The air in a room of volume 27.0 m³ is at a temperature of 22 °C and a pressure of 105 kPa.

Calculate:

(i) the temperature, in K, of the air,

(ii) the number of moles of air in the room,

(iii) the number of gas molecules in the room.

(5 marks)

(b) The temperature of an ideal gas in a sealed container falls.

State, with a reason, what happens to the:

(i) mean square speed of the gas molecules,

(ii) pressure of the gas.

(4 marks)

(Total 9 marks)