Number 67 page 63 of the examkrackers general chemistry book. The answer is D, which I understand but why is A. Heat can be changed completely to work in cyclical processes true? I thought that heat could never be 100% turned into work??? Also did anyone find the description of thermodynamics (chapter 3) to be pretty ****ty? I used my own intuition to figure out most of the questions in this chapter. I felt like they were going into detailed theory a lot more than it should've been done (maybe i'm wrong???). I feel like this was mathematics except analyzing why we add or subtract and how it was derived and all this unnecessary stuff. Or do we need the abstract knowledge of thermodynamics..