Chapter 18, Problem 27PCE

(a)

To determine

The temperature at point $A$, $B$ and $C$.

(b)

To determine

The heat enters or leaves the system for process $A\to B$, $B\to C$ and $C\to A$.

(c)

To determine

The heat exchanged with the gas in process $A\to B$, $B\to C$ and $C\to A$.