Entropy

Every 7 weeks we have to do a course about some basic priciples which most of us have done several years ago..
So it's quite heavy to handle all the figures about properties of water and steam.
We have to calculate with the aid of steamtables and diagrams like this with the properties of temperature versus entropy , the so-called T-S diagram.

After this week we are supposed to know everything we wanted to know but were afraid to ask about thermodynamics.....