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HW #1

HW #1. Table 1.2. Coal 3.7 tons Gas 74,900 ft 3 Petroleum 23.2 bbl Nuclear 2600 kWh * Renewables 1986 kWh * * ’equivalent thermal energy’. coal. 3.7 tons x 2.81 x 10 10 J / ton = 10.397 x 10 10 J. Gas. 74,900 ft 3 x 1.09 x 10 9 J/thousand ft 3 =

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HW #1

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  1. HW #1

  2. Table 1.2 Coal 3.7 tons Gas 74,900 ft3 Petroleum 23.2 bbl Nuclear 2600 kWh * Renewables 1986 kWh * * ’equivalent thermal energy’

  3. coal 3.7 tons x 2.81 x 10 10 J / ton = 10.397 x 1010 J

  4. Gas • 74,900 ft3 x 1.09 x 109 J/thousand ft3 = = 74.9 thousand ft3 x 1.09 x 109 J/thousand ft3 =81.641 x 109 J =8.1641 x 10 10 J

  5. Oil 23.2 bbl x 6.12 x 109 J/bbl = 141.984 x 10 9 J =14.1984 x 10 10 J

  6. Nuclear 2600 kwh x 3.60 x 106 J/kwh =9360 x 106 J =0.936 x 1010 J Ditto renewables 0.717 x 10 10 J

  7. So--- • Coal gave you 10 x 10 10 J • Gas gave you 8 x 10 10 J • Oil gave you 14 x 1010 J • Nuclear gave you 0.9 x 10 10 J • Renewables gave you 0.7 x 10 10 J (Pencil those onto Table 1.2)

  8. Process heat Heat energy used as heat itself, not electricity • Smelting iron • Drying grain • Heating tar sands to liquify the oil • Heating petroleum to separate the components

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