The pressure and temperature at the beginning of compression of a cold air-standard diesel cycle are 100 kpa and 300k, respectively. at the end of the heat addition, the pressure is 7.2 mpa and the temperature is 2250 k. assume constant specific heats evaluated at 300 k. determine the cut-off ratio. there is a +/- 5% tolerance.

Air contained in a piston-cylinder assembly undergoes a process from an bar. the initial pressure of 1 bar and temperature of 400 k to a final pressur initial volume of air is 0.2 m3. the process is described by pv- constant. assuming ideal gas behavior and neglecting kinetic and potential energy effects, determine the a)-mass of air, in kg b)-work for the process, in kj c)-heat transfer for the process, in kj pts