"Thermodynamics is a funny subject. The 1st time you go through it, you just don't understand it at all.The 2nd time you go through it, you think you understand it, except for one or two small points.The 3rd you go through it, you know you don't understand it, but by that time you are so used to it, it just doesn't bother you anymore."
yeah! I certainly you are right Arnold..haiyaa..
p/s: try study Rankine Cycle. 1 simple question..solution almost 5-6 pages.pergh!