5. (a) There is 1000 kg water in a swimming pool. Consider the liquid water as an incompressible model at room temperature. If the temperature of the water body is increased by 3 degrees C (assuming this temperature change is uniform across the entire pool), determine: (i) the total internal energy change of the water, (ii) the total enthalpy change of the water. Use a constant heat capacity of water c = 4.211 kJ/kg. K. (b) In a big closed room, there is 1000 kg of air. Suppose the air is an ideal gas model at room temperature. The temperature of the room is increased by 3 degrees C heated by an electric heater. Suppose this temperature change is uniform across the entire room. (iii) Determine the total internal energy change of the air. (iv) Determine the total enthalpy change of the air. Use constant heat capacities of air c₂ = 0.718 kJ/kg K and Cp 1.005 kJ/kg.K.

5. (a) There is 1000 kg water in a swimming pool. Consider the liquid water as an incompressible model at room temperature. If the temperature of the water body is increased by 3 degrees C (assuming this temperature change is uniform across the entire pool), determine: (i) the total internal energy change of the water, (ii) the total enthalpy change of the water. Use a constant heat capacity of water c = 4.211 kJ/kg. K. (b) In a big closed room, there is 1000 kg of air. Suppose the air is an ideal gas model at room temperature. The temperature of the room is increased by 3 degrees C heated by an electric heater. Suppose this temperature change is uniform across the entire room. (iii) Determine the total internal energy change of the air. (iv) Determine the total enthalpy change of the air. Use constant heat capacities of air c₂ = 0.718 kJ/kg K and Cp 1.005 kJ/kg.K.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

5. (a) There is 1000 kg water in a swimming pool. Consider the liquid water as an incompressible model at
room temperature. If the temperature of the water body is increased by 3 degrees C (assuming this temperature
change is uniform across the entire pool), determine: (i) the total internal energy change of the water, (ii) the
total enthalpy change of the water. Use a constant heat capacity of water c = 4.211 kJ/kg. K.
(b) In a big closed room, there is 1000 kg of air. Suppose the air is an ideal gas model at room temperature. The
temperature of the room is increased by 3 degrees C heated by an electric heater. Suppose this temperature
change is uniform across the entire room. (iii) Determine the total internal energy change of the air. (iv)
Determine the total enthalpy change of the air. Use constant heat capacities of air c₂ = 0.718 kJ/kg . K and
Cp = 1.005 kJ/kg.K.

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