Solve the below problem:
Q: In a co-flowing (same direction) heat exchanger 1 kg/s air at 500 K flows into one channel and 2 kg/s air flows into the neighboring channel at 300 K. If it is infinitely long what is the exit temperature? Sketch the variation of T in the two flows. You should solve the problem step by step.You must include all the units which are needed to solve the given problem.