Refrigerant-134a, at 1.5 MPa, 90 °C, is to be cooled by air to a state of 1 enters at 110 kPa, 25 °C with a volume flow rate of 820 m³/min and lea

Helium is compressed through a compressor steadily.  At the inlet the pressure is   and the temperature is  . At the exit the pressure is    and the temperature is  .  The power input is   and the heat loss rate is   during this process.  Neglect the kinetic and potential energy changes.  Assume helium is ideal gas with a constant specific heat   and its specific heat ratio  , which means that enthalpy can be calculated using  .  Calculate the work per unit mass   _________

Sketch and label the nozzle. Sketch and label the process on a P-v diagram, also mention all numbers on the process of P-V diagram please. 7.15 The exit nozzle in a jet engine receives air at 1200 K, 150 kPa with negligible kinetic energy. The exit pressure is 80 kPa, and the process is reversible and adiabatic. Use constant specific heat at 300 K to find the exit velocity.

Please be very detailed