if we define the system as the water and the copper cube together, we can also say that there is no loss of heat to the surroundings due to the cup’s insulating properties. considering this, what is the value of qsystem? enter your answer in terms of joules, but do not include the units in the blank.

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]