1. The exhaust gases (mixed) is used to heat water (unmixed) in a single-pass, cross-flow heat exchanger. Assume the exhaust gases have identical thermophysical properties as air and they enter and exit the exchanger at 225 and 100 C, respectively. The water flows at a rate of 3 kg/s and is heated from 30 to 80 C. Assuming the overall heat transfer coefficient is 300 W/m2.K, estimate the required surface area

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor