(a)[2]
State the states A, B and C.
(b)[2]
Explain, in terms of forces between molecules, why gases expand more than liquids when they experience the same rise in temperature. Assume that the pressure stays constant.
(c(i))[3]
The piston is pushed to the left and held in a new position. The pressure of the gas in the cylinder rises to $2.5 \times 10^5$ Pa. Assume that the gas temperature does not change. Calculate the new volume of the gas.
(c(ii))[3]
The gas in the cylinder is now heated. The piston stays fixed in the same position as in (c)(i). State and explain, in terms of molecules, any change in the pressure of the gas.