**1. The problem statement, all variables and given/known data**

See attachment

In the first place I don’t understand why you can just say: dV/V = ln(Vd/Va) ( was given in lecture slides)

And im not sure if my attempt to the solutions is any good….

Hope Someren can help me a bit with b and c

**2. Relevant equations**

**3. The attempt at a solution**

See second attachment

http://ift.tt/1hARBgf