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Homework Help: Coal energy and heating a home . . .

  1. Feb 27, 2008 #1
    How many pounds of western subbituminous coal would be needed to heat the house (house requires 1,000,000 BTU), with a 60% efficient furnace?

    Subitiminous coal = 10,750 BTU/lb

    1,000,000 BTU
    ____________ = 93.02 lb of coal.
    10,750 Btu/lb

    And I am not exactly sure how to take into account the 60% efficiency:

    Take 93.02 / 0.6 = 155.0 lb coal, needed to heat the house. Is that correct?
  2. jcsd
  3. Mar 1, 2008 #2

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