Internal energy change from A to C is +700 J. Follow the path ABC, the gas does +400 J of work.
a) Follow the path ABC, what is the heat transfer Q?
b) If PC = 5PA , what is the work done from C to D?
c) Follow the path CDA, what is the heat transfer Q?
d) If the change of internal energy is +400 J from D to A, what is the heat transfer Q from D to A?