1. The problem statement, all variables and given/known data Steam at a pressure of 4 MPa and 400 C and flow rate of 10 kg/s is expanded in a turbine to a pressure of 10 kPa. If the isentropic efficiency of the turbine is 0.85 then the actual power produced by the turbine is? 2. Relevant equations: ηt= (m(h1-h2))/(m(h1-h2s)) = (W act) / (W max) s2s=s1 s2s=sf +x(sfg) <~~ To get quality h2=hf +x(hfg) 3. The attempt at a solution I started by looking up enthalpies and entropies at state one and two. Since s2s = s1, i used sf and sfg of P2 to find the quality and used that quality to find h2. I substituted all known values into the isentropic efficiency equation and i found h2s. After that, i plugged in all known values back into the Isentropic Eff eqn to solve for Wact and its incorrect. Did i miss a step or did them incorrectly?