Consider a mass of air (perfect gas), m = 10 kg cooled isochorically (constant volume) from the initial state(P1= 1MPa, T1= 200℃). If the temperature of the surroundingsisT2= 27℃. Determine the entropy change of theair, the surroundings, and the universe.

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]

What is the main objective of using reheat rankine cycle?