P21_062 - . 7 10 6 MJ where we use the fact that a Watt is a

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62. A metric ton is 1000 kg, so that the heat generated by burning 380 metric tons during one hour is (380000 kg)(28 MJ / kg) = 10 . 6 × 10 6 MJ . The work done in one hour is W = (750 MJ / s)(3600 s) = 2
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Unformatted text preview: . 7 10 6 MJ where we use the fact that a Watt is a Joule-per-second. By Eq. 21-9, the eciency is = 2 . 7 10 6 MJ 10 . 6 10 6 MJ = 0 . 253 = 25% ....
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