The Stirling Cycle, or the cycle that the engine runs, is comprised of the following four steps:

State 1-2: Isothermal expansion

State 2-3: Isochoric heat removal

State 3-4: Isothermal compression

State 4-1: Isochoric heat additional

Assuming that the working fluid inside the engine is an ideal gas, complete the following:

a. Draw the Stirling cycle on a P-v diagram. Number each of the states and indicate thedirection of each of the processes. Also write the equation for the line of eachprocess in the form P=f(v).

b. Draw the Stirling cycle on a P-T diagram. Number each of the states and indicate thedirection of each of the processes. Also write the equation for the line of eachprocess in the form P=f(T).

c. Draw the Stirling cycle on a T-v diagram. Number each of the states and indicate thedirection of each of the processes. Also write the equation for the line of eachprocess in the form T=f(v).

d. What is the net change in internal energy of the working fluid over the cycle? Why?