Thermodynamics help please!
i cannot get?number 2 on my homework and need some help please.
Thermo I HW#7
Due Wednesday, April 6th at the beginning of class.
1. In class we worked through Illustration 4.5-1 in your book. Solve the problem again, this
time accounting for the temperature dependence of air (using App A-II). (6 pts)
2. 1 mol of Nitrogen (N2) enters a steady-state flow process at 800K and 50 bar and exits at
300K and 1 bar. Assume that the heat is transferred into this process at the exit
temperature. Determine the maximum work (J) that can be obtained.
P = 50 bar
T = 300K
P = 1 bar
a) Assume Nitrogen is an ideal gas with a constant Cp chosen from the following
published table: (6 pts)
Specific Heat, Cp
b) Assume Nitrogen is an ideal gas with a Cp given in App A.II. (8 pts)
3. Calculate the entropy generated by the flow of 10 mol/s of nitrogen at 500oC and 500 bar
undergoing a Joule-Thomson expansion to 1 bar. For this case, assume nitrogen is an
ideal gas with a Cp*=3.923 kJ/kgK. (5 pts)