Question

Within a piston-cylinder assembly, 2.5 kg air executes Carnot power cycle. During the process of isothermal expansion, heat transfer to air is 50 kJ. Volume is 0.45 m3 at the end of isothermal expansion process. This Carnot power cycle operates within a temperature range of 250 K to 700 K. Assuming an ideal gas model, (a) Determine the pressure (kPa) and volume (m3 ) at the beginning of isothermal expansion. (b) Calculate the thermal efficiency. (c) Calculate the heat transfer (kJ) and work (kJ) for all four processes. (d) Sketch the cycle on p-v coordinates.Within a piston-cylinder assembly, 2.5 kg air executes Carnot power cycle. During the process of isothermal expansion, heat transfer to air is 50 kJ. Volume is 0.45 m3 at the end of isothermal expansion process. This Carnot power cycle operates within a temperature range of 250 K to 700 K. Assuming an ideal gas model, (a) Determine the pressure (kPa) and volume (m3 ) at the beginning of isothermal expansion. (b) Calculate the thermal efficiency. (c) Calculate the heat transfer (kJ) and work (kJ) for all four processes. (d) Sketch the cycle on p-v coordinates.

Answer 1

a) 1225 kPa, 0.41 m³

b) 0.643

c) -17.86 kJ, 50 kJ, 854 kJ, -854 kJ

Step-by-step explanation:

See attachment