Thermodynamics Question (What did I do wrong?) Problem 19.46 Two moles of N2 gas undergo the cycle abcd. The pressure of the gas in each state is: pa = pd = 5700 Pa ;pb = pc 1700 . The volume of the gas in each state is: Va = Vb = 2.40 ;Vc= Vd 8.50 . The gas may be treated as ideal. Find the total work done on (or by) the gas in the complete cycle? from a to b volume is constant so therefore W = 0 from b to c pressure is constant , so W = p(Vc-Vb) = 10370 J from c to d volume is constant so therefore W = 0 from d to a pressure is constant, so W = p(Va-Vd) = -34770 J total W= 10370 J - 34770 J = -24400 J somehow this awnser is wrong, someone please help me out, what am I doing wrong?