[QUE/TH-06013] TH-PROBLEM

An ideal gas for which $C_v=3R/2$ is the working substance of
a cannot engine. During the isothermal expansion the volume doubles.
The ratio of the final volume to the initial volume in the adiabatic
expansion is 5.7. The work output of the engine is $9\times10^5$ J
in each cycle. Compute the temperature of reservoir between which
the engine operates. Number of moles $=10^3$