Processes A to B and C to D are parts of straight line graphs of form y=mx. Also, p=
µR
V
T(µ=3) p∝T So, volume remains constant for the graphs AB and CD. So, no work is done during processes for A to B and C to D. and WAB=WCD=0 WBC=p2(VC−VB) =µR(TC−TB) =3R(2400−800) =3R×1600 =4800R WDA=p1(VA−VD) =µR(TA−TD) =3R(400−1200) =−2400R Work done in complete cycle W=WAB+WBC+WCD+WDA =0+4800R+0+(−2400)R =2400R =19.944J=20kJ