In an industrial process ethanol C2H60 burns with O2 to produce heat. Each mole of ethanol produces 8842 joules during the reaction. C2H5OH (1) + 3 O2(g) 2 CO2(g) + 3 H2O(0) + 8842 Joules
How many Kilojoules are obtained from burning 982.6 g of ethanol?

Explanation:

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In this case, since one mole of ethanol release 8,842 J per 1 mole of ethanol, we can write:

Thus, since we need the energy released by 982.6 g of ethanol, we compute the moles in such mass of fuel:

Therefore, the result is:

Which in kJ is:

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