3. A room is to be heated by 1000 kg of a liquid contained in a tank placed in the room. The room is not well insulated and loses 192, 000 kJ of heat to the outside. The room is kept at a constant temperature of 20°C. If the final temperature of the liquid is 25°C, determine its initial temperature. If needed use: For the liquid Cp=4 kJ/kg.K For Air: R=0.287 kJ/kg.K C, = 0.718 kJ/kg.K 192,000 kJ C₂ = 1.005 kJ/kg.K

3. A room is to be heated by 1000 kg of a liquid contained in a tank placed in the room. The room is not well insulated and loses 192, 000 kJ of heat to the outside. The room is kept at a constant temperature of 20°C. If the final temperature of the liquid is 25°C, determine its initial temperature. If needed use: For the liquid Cp=4 kJ/kg.K For Air: R=0.287 kJ/kg.K C, = 0.718 kJ/kg.K 192,000 kJ C₂ = 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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Question

3. A room is to be heated by 1000 kg of a liquid contained in a tank placed in the room. The room is not well insulated
and loses 192, 000 kJ of heat to the outside. The room is kept at a constant temperature of 20°C. If the final
temperature of the liquid is 25°C, determine its initial temperature.
If needed use:
For the liquid Cp= 4 kJ/kg.K
For Air: R=0.287 kJ/kg.K
liquid tank
C₂ = 0.718 kJ/kg.K
192,000 kJ
C₂ = 1.005 kJ/kg.K

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