A cylinder with a piston contains 0.150 mol of nitrogen at 1.80 105 Pa and 300 K. The nitrogen may be treated as an ideal gas. For nitrogen: = 1.40. The gas is first compressed isobarically to half its original volume. It then expands adiabatically back to its original volume, and finally it is heated isochorically to its original pressure.Compute the minimum pressure.