CAPE Physics Unit 1 · 2019 · Paper 2 · Question 3(d)(i)

A monatomic ideal gas in an engine goes through a cycle with four stages, as shown in Table 3. The quantity of gas is 0.0052 moles. At Stage A, the gas has a pressure of 6.0 × 10⁵ Pa and a volume of 5.0 × 10⁻⁵ m³. The gas is heated at constant volume to Stage B, where its temperature increases to 800 K. The gas then undergoes an adiabatic expansion, doing 37 J of work, until its pressure is 8.6 × 10⁵ Pa and its volume is 7.0 × 10⁻⁵ m³ at Stage C. At Stage D, the pressure is 6.0 × 10⁵ Pa and the volume is 7.0 × 10⁻⁵ m³.

Using the information given in Table 3 on page 20, sketch a P-V graph of the gas engine cycle, clearly labelling EACH stage and its corresponding pressure and volume.

This question uses a figure or table from the paper — you'll see it when you practise.