The average thermal conductivity of the walls (including windows)and roof of a house in Figure P11.32 is 4.8 10-4 kW/m·°C, and theiraverage thickness is 20.0 cm. Thehouse is heated with natural gas, with a heat of combustion (energygiven off per cubic meter of gas burned) of 9300kcal/m3. How many cubic meters of gas must be burnedeach day to maintain an inside temperature of 26.5°C if the outside temperature is0.0°C? Disregard radiation and loss by heat through theground.

It was completely understandable in solving for the answer up untilfinding the cubic meters per day part. A thorough explanationafterwards would be greatly appreciated. The other workouts seem tobe basically the same except for the numbers, and though greatexplanations, a little bit more would be appreciated.

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