0.8 m' of water (assume density of water = 1,000 kg/m?) are mixed with 1.4m² of liquid of relative density 0.83. What is the density of the mixture if there is no change in total
volume on mixing?

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?