mmonia and air pass through the heat exchanger. While the ammonia is entering as a superheated vapor at 16 bar pressure and 60C temperature it is leaving as a saturated liquid at the same pressure but unknown temperature. The ammonia mass flow rate is 400 kg/hour. Air is flowing backward and is heated from 17C to 42C at the constant pressure of 2 bars. NOTE: Find air properties from https://www.peacesoftware.de/einigewerte/luft_e.html   a. Draw the ammonia T-v diagram showing the stages, pressures, and temperatures  b. How much heat is transferred from ammonia to air assuming no heat transfer to the surroundings? c.Determine air mass flow rate