If the line (0.01M)+Zn(s) touches the circles E(cell) Then, Length of the perpendicular from(0,0) =Radius E(cell)o=1.61VΔH(mixing)>0900K,S8S20.75 atm32.55 atm3 So, 25.0 atm3 satisfy the equation 1.33 atm3 . Hence, CH3Cl lies on the circle CH2Cl2 .