Heat is an unwanted byproduct of many household appliances. Incandescent light b

Question

Heat is an unwanted byproduct of many household appliances. Incandescent light bulbs are very inefficient with 98% of the energy being lost as heat and only 2% being turned into light. How much (in degrees C) will the air a sealed and insulated room (5m by 4 m by 3 m) heat up if a 100 watt incandescent light bulb is run for 1 hour? Assume the air in the room can be treated at pure nitrogen and that the heat capacity of nitrogen gas is 1.04 J/g-K. Also assume that the density of the air is approximately 1 kg/cubic meter. Lastly, the conversion between watts and Joules is: 1 watt = 1J/sec.

9.34 C

3.73 C

7.34 C

3.92 C

5.65 C

Explanation / Answer

my answer:

5.65 C

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