Chemistry

Gasohol contains ethanol (C2H4OH)(l), which when burned reacts with oxygen to produce CO2(g) and H2O(g). How much heat is released when 12.5g of ethanol burns?

C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3H2O(l)

Delta H = -1368kJ

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  1. You get 1368 kJ when 1 mole (46 g) is burned; how much will you get when you burn 12.5 g?

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  2. 335.5kj

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  3. 12.5 x (1mol/46.0g) = .271 mol of ethanol

    .271 x 1368 = 370

    (randi did 1235 Delta H, not 1368)

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  4. how about the negative sign?

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  5. -371.7

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  6. What Rght said

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