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Energy sources answers

2. (a) Amount of carbon in 1000 g of anthracite = ((95/100) x 1000) ÷ 12.01 = 79.1 mol Amount of hydrogen in 1000 g of anthracite = ((3/100) x 1000) ÷ 1.01 = 29.9 mol Heat evolved from combusting carbon = 79.1 x 394 kJ = 31165.4 kJ Heat evolved from combusting hydrogen (H2) = (29.9/2) x 286 = 4275.7 kJ Heat evolved from combusting 1 kg of anthracite = 31165.4 + 4275.7 = 35441 kJ Specific energy = 35400 kJ kg-1 (to 3...

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