1. The problem statement, all variables and given/known data CO2 gas enters a nozzle with an isentropic efficiency of 83% with a low velocity. It exits the nozzle at 110 kpa and 59K and 246m/s. Determine the pressure at the nozzle inlet assuming: 2. Relevant equations -Constant specific heats at room temperature -Variable specific heats 3. The attempt at a solution I first started by using the energy balance equation of a single stream steady flow device, and simplified it to: Q=m(h2-h1) + 1/2(V2^2) The isentropic equation is ηNozzle= (T2a-T1)/(T2s-T1) I am at a loss in finding the inlet temperature and pressure. I am not sure how i should start of solving this question and what method to use.