Thanks for the help - I appreciate the responses.......have returned to school after a LONG break and some of the basics are pretty hazy
I thought that a control volume would only be applied to fluids?
By the S's I was meaning entropy, didn't know how to show using subscripts.
Side question - I know that when you are given two properties of a fluid (such as temperature and pressure) that you should know what state they are in (superheated etc).......but how exactly is that determined?
And, iff you are given both temp and press which table should you be using?