posted by Elgoog .
FIGURE: h t t p : / / g o o . g l / a 7 j C F
The figure is a PV diagram for a reversible heat engine in which 1.0 mol of argon, a nearly ideal monatomic gas, is initially at STP (point a). Points b and c are on an isotherm at T = 423 K. Process ab is at constant volume, process ac at constant pressure.
What is the efficiency of this engine?