A hypothetical countercurrent heat exchanger having an infinite heat transfer area is used to cool 10,000 lbmass/h of water entering at 150°F. The coolant is 5,000 lbmass/h of water entering at 100°F....

A hypothetical countercurrent heat exchanger having an infinite heat transfer area is used to cool 10,000 lbmass/h of water entering at 150°F. The coolant is 5,000 lbmass/h of water entering at 100°F.

a) What are the exit temperatures of the streams?

b) What is the rate of heat transferred?