Answer
a) constant pressure
b) adiabatic
c) constant pressure
d) adiabatic
Work Step by Step
(a) We know that the area under the constant pressure curve is greater, hence the maximum work is done when the gas expands at constant pressure.
(b) We know that the area under the adiabatic curve is minimum, hence the work done in this process is the least because this curve is steeper than the others.
(c) We know that the final temperature is highest at constant pressure expansion because the temperature varies with pressure for a given volume.
(d) The final temperature is lowest in adiabatic expansion as the final volume and temperature is proportional to pressure.
