Perfectly
Reversible Gas Engine This is an Ideal-Gas cycle between two
Isothermal processes and two adiabatic processes.
http://www.brighthubengineering.com/thermodynamics/3883-carnot-theorem-in-relation-to-second-law-of-thermodynamics-part-two/
an Isothermal process is where the the
temperature is constant. On a Pressure vs.
Volume graph the work done on the system is the
negative area under the curve.
http://physics.bu.edu/~duffy/py105/Firstlaw.html
an Adiabatic process is where no heat energy
is transferred between the outside environment
and the system.
