On the property diagrams indicated below, sketch (not to scale) with respect to the saturated liquid and saturated vapor lines and label the following processes and states for refrigerant-134a. Use arrows to indicate the direction of the process, and label the initial and final states:

(a) On the P-v diagram, sketch the constant-temperature pro- cess through the state P = 280 kPa, v = 0.06 m3/kg as pres- sure changes from P1 = 400 kPa to P2 = 200 kPa. Place the value of the temperature on the process curve on the P-v diagram.

(b) On the T-v diagram, sketch the constant-specific-volume process through the state T = 20C, v = 0.02 m3/kg from P1 = 1200 kPa to P2 = 300 kPa. For this data set, place the temperature values at states 1 and 2 on its axis. Place the value of the specific volume on its axis.