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What mass of octane must be burned in order to liberate 5410 kJ of heat?
11 years ago

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DrBob222
Do you have the heat of combustion? If not you can calculate it this way.
2C8H18 + 25O2 ==> 16CO2 + 18H2O

dHrxn = dH combustion = (n*dHo formation products) - n*dHo reactants).
So you will obtain that many kJ for 228 g octane. Convert that to grams needed for 5410 kJ.
Post your work if you get stuck.


11 years ago

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