An adiabatic heat exchanger uses saturated steam to heat water flowing at 60 kg/s from 40℃ to 90℃. The steam exits the heat exchanger at a rate of 5 kg/s as a liquid at atmospheric pressure. If the inlet
pressure is 200 kPa, calculate the:
a) Energy gained by the saturated water using enthalpies.
b) Enthalpy of the inlet steam and the steam quality.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?