1.Was the pseudo-steady-state (P.S.S.) assumption we used in our quantitative semi-batch (tank-with-cooling coil) heat exchanger example valid? For full credit, you must provide supporting calculations based on the numbers given in that example problem.

2.You are using a countercurrent, shell-and-tube heat exchanger to cool a 100 kg/min process stream from 80 C to 50 C. This process is to be performed using chilled water supplied at 5 C, and the process fluid had water-like thermal properties. Based on this, please do the following:*

(a) Determine the minimum chilled water flow rate required for this operation to be possible.

(b) Determine the minimum chilled water flow rate that would be required if this countercurrent heat exchanger was replaced with a cocurrent one.

(c) Explain the practical implications of the different utility fluid requirements you found in Parts (a) and (b). (i.e., Which flow configuration works best?)

(d) Provide a physical explanation for how the values you calculated in Parts (a) and (b) compar