A mixture of 75% carbon dioxide and 25% water by mass is flowing at 1600 K, 100

Question:

A mixture of 75% carbon dioxide and 25% water by mass is flowing at 1600 K, 100 kPa into a heat exchanger where it is used to deliver energy to a heat engine. The mixture leave the heat exchanger at 500 K with a mass flow rate of 2 kg/min. Find the rate of energy and the rate of exergy delivered to the heat engine.