Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 400 Kand Tc = 300 K. The energy rejected by heat transfer at 400 K has a magnitude of 625 kJ per kg of air. The pressure at the start of the isothermal expansion is 325 kPa. p-v diagram for a Carnot gas refrigeration or heat pump cycle. Assuming the ideal gas model for the air, determine: (a) the magnitude of the net work input, in kJ per kg of air, and (b) the pressure at the end of the isothermal expansion, in kPa.

I need help with the diagnrams for this thermo practice problem  2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cycle made up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Sketch this cycle on a P-v diagram and on a T-s diagram, clearly indicating all state points and the three processes.

An engine has the Lenoir thermodynamic cycle as shown in the figure. Given:    1 mol of ideal gas  CP,m = 3.5 R  P1 = 2 atm ; P2 = 5 atm  V1 = 3000 cm3 ; V3 = 6000 cm3 Find the following: Temperature at (P1, V1), (P2, V2), and (P2, V1) QH and Qc (Note; QH comes from Process 1->2; Proces 2-3 is considered isentropic efficiency of the engine

Please explain each step