A clockwise rectangular cycle ABCD is carried out on an ideal gas as follows:
• A→B: isobaric expansion at P2=3.0×105Pa from V1=0.02m3 to V2=0.05m3.
• B→C: isochoric cooling to P1=1.0×105Pa.
• C→D: isobaric compression at P1 back to V1.
• D→A: isochoric heating back to P2.
Find the net heat absorbed in one complete cycle.
(a) −6.0×103J
(b) 9.0×103J
(c) 6.0×103J
(d) 3.0×103J