a certain quantity of air is initially at 200 kpa and 35 degree c. if the final state after a thermodynamic process is 120 kPa and 10 degree celcius, find the polytropic index of the process and describe what type of process this index represents

You have steam at 500°C with specific volume 0.62.  Calculate its specific enthalpy in KJ/kg.

(b) A piston-cylinder device contains 0.6 m' air at 150 kPa and 30°C. The air is compressed according to PV"-constant to a pressure of 800 kPa and a temperature of 185°C. Assume air as an ideal gas with R -0.287 kJ/kg.K. i. Determine the polytopic index (n). ii. Calculate the work done, kJ. Sketch and label the process on a pressure versus volume (P-1) diagram.