A 3-m x 4-m x 5-m room is to be heated by one ton the

Chapter 4, Problem 124P

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Problem 124P

A 3-m x 4-m x 5-m room is to be heated by one ton the room. The room is losing heat to the outside at an average rate of 6000 kJ/h. The room is initially at 20°C and 100 kPa and is maintained at an average temperature of 20°C at all times. If the hot water is to meet the heating requirements of this room for a 24-h period, determine the minimum temperature of the water when it is first brought into the room. Assume constant specific heats for both air and water at room temperature.

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