An ideal gas Cp=7/2R is heated in a steady flow heat exchanger from 68F (20C) t 212F (100C) by another steam of the same ideal gas which enters at 356F (180C). The flow rates of the two streams are the same, and heat losses from the exchanger are negligible. Calculate the molal entropy changes of the two gas streams for both parallel and countercurrent flow in the exchanger. What is ASt in each case? Repeat parts a and b for counter-current flow if the stream that is cooled enters an infinite heat exchanger at 212F (100C). a. C.