A 30 L electrical radiator containing heating oil is placed in a 50 m3 room Both the room and the oil in the radiator are initially at 10 deg C The radiator with a rating of 1 8 kW is now turned on At the same time, heat is lost from the room at an average rate of 0 35 kJ s After some time, the average temperature is measured to be 20 deg C for the air in the room, and 50 deg C for the oil in the radiator Taking the density and the specific heat of the oil to be 950 kg m3 and 2 2 kJ kg deg C, respectively, determine how long the heater is kept on Assume the room is well sealed so that there are no air leaks Room 10C 2 Radiator

Question: A 30-L electrical radiator containing heating oil is placed in a 50-m3 room. Both the room and the oil in the radiator are initially at

A 30-L electrical radiator containing heating oil is placed in a 50-m3 room. Both the room and the oil in the radiator are initially at 10°C. The radiator with a rating of 1.8 kW is now turned on. At the same time, heat is lost from the room at an average rate of 0.35 kJ/s. After some time, the average temperature is measured to be 20°C for the air in the room, and 50°C for the oil in the radiator. Taking the density and the specific heat of the oil to be 950 kg/m3 and 2.2 kJ/kg °C, respectively, determine how long the heater is kept on. Assume the room is well-sealed so that there are no air leaks.

A 30-L electrical radiator containing

Room 10C 2 Radiator

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