One
of oxygen,
, in a piston-cylinder assembly undergoes a cycle consisting of the following processes:
Process 1-2: Constant-pressure expansion from
,
to
.
Process 2-3t Compression to
and
with
tu.
Process 3-1: Constant-volume cooling to state
Employing the ideal gas model with
evaluated at
, determine the change in specific entropy, in Btu/lb
, for each process. Sketch the cycle on
and
coordinates.
