A fixed mass of nitrogen gas is compressed inside a cylinder, with no change in temperature.
The table below shows the pressure P1 P_1\,P1 and volume V1 V_1\,V1 before the gas is compressed, and the volume V2 V_2\,V2 after the gas is compressed.
| pressure in kPa | volume in m3\text{m}^3m3 | |
|---|---|---|
| before the gas is compressed | P1=140P_1 = 140P1=140 | V1=1.6V_1 = 1.6V1=1.6 |
| after the gas is compressed | P2=P_2 =P2= | V2=0.40V_2 = 0.40V2=0.40 |
Calculate the pressure P2 P_2\,P2 after the gas is compressed. Use the equation:
P2=P1×V1V2 P_2 = \frac{P_1 \times V_1}{V_2} P2=V2P1×V138 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.