Hello, everyone I would very much appreciate some help on this Intro to Thermo 2 problem if someone could give advice even a little would be helpful. 1. Air (for this example, an ideal gas) is being used to produce work in a turbine and then is expanded to atmospheric pressure (101.2 kPa) through a Joule-Thomson expansion then released to the environment. The turbine is producing work and takes in 100g/min of air at 1 MPa at 500 C. Air exits the turbine at 150C. Cv=20J/mol*K Mw=29g/mol a.) The turbine loses 2kJ/min of heat, determine the work produced by the turbine. b.) Find T2 of the joule-thomson expansion. 2. Relevant equations energy balance: d/dt(U+M(V^2/2+gh)=Mk(mass flow) (H+v^2/2+gh)+Q+W deltaH=Cp(deltaT) Cp=Cv+R PV=nrT (possibly relevant?) Here is my attempt at a solution: a.) So in the energy balance you can get rid of irrelevant terms and simplify down to 0=Mk(H)+Q+w. Am I correct in making the left side 0, since it is most likely steady state? Nothing is changing with respect to time and I don't believe there is internal energy change. now I solved for H using deltaH=Cp(deltaT) finding cp with cv and R. Then I solved for W and found the answer in kW. I believe this is right but I don't know if my assumption of the left side being 0 is wrong, also I feel weird not using that 1 MPa for anything. b.) In a Joule-Thomson expansion Hin=Hout so the energy balance becomes Mk(deltaH) M1=M2 so its just deltaH thewn I used delta H equation to get 0=Cp*deltaT and solved for T2, I feel confident but I didnt even use Pin or Pout, am I missing something here???