Calculating Heat Loss from Room with Refrigerator and Heater

AI Thread Summary
The discussion revolves around calculating heat loss in a room with a refrigerator and a heater, where both appliances are running continuously but the room temperature remains constant. The refrigerator consumes 250 W, and the heater uses 1 kW, leading to a total input of 1250 W. Participants highlight the concept of energy conservation, stating that if the temperature is stable, the heat loss from the room must equal the total energy input from the appliances. This indicates that the heat loss rate is effectively balanced by the energy supplied by the refrigerator and heater. Understanding this equilibrium is key to solving the problem.
oliverjames
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A room contains 25 kg of air at 100KPa and 10 degree C. The room has a 250-W refrigerator (the refrigerator consumes 250 W of electricity when running) and 1-KW electric resistance heater. During a cold winter day, it is observed that both the refrigerator and the resistance heater are running continuously but the air temperature in the room remains constant. The rate of heat loss from the room during that day is:

I`m having trouble solving this . can anyone please help?

cheers
james
 
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It's a bit of a trick question, but when you see the trick, it is rediculously easy (that should be a hint...).
 
ok . if i omit the room criteria and if i`m taking only the refrigerator data the heat loss to the room would be 1250 Kw. correct me if i was wrong. Thanks . James
 
Yep, it really is that easy. Nice! Conservation of energy says that if you're at an equilibrium, the inputs and outputs must be equal.
 
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