Four challenging thermodynamics exam problems

[allthatrock]

urgent thermodynamics problems

I have four problems that I need an alternate view on the solution for. if someone can try to solve them and put up scanned copies of the solution for me. These are challenge problems submitted in class and I have been informed individuals with an understanding of these will be able to score high on the exam. I hope someone can help me in these. Please have a look these ARE challenging.

 

[russ_watters]

That's not how we do things here.