3 years ago

Please help been stuck on this for a couple minutes

Engineering

1 answer:

AnnyKZ [126]3 years ago

3 0

Answer:

true

Explanation: Fire extinguishers do need water buckets on sand on the other hand sand is also true so that means the awnser is true!

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An automotive fuel has a molar composition of 85% ethanol (C2H5OH) and 15% octane (C8H18). For complete combustion in air, deter

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a) 1

b) 1813.96 MJ/kmol

c) 32.43 MJ/kg , 1980.39 MJ/Kmol

Explanation:

molar mass of ethanol (C2H5OH) = 46 g/mol

molar mass of octane (C8H18) = 114 g/mol

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octane = 0.15 / 114

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attached below

mass of air / mass of fuel = 12.17 / 1 = 12.17

b ) Determine the lower heating value

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c) Determine higher heating value ( HHV )

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HHV in MJ/kg = 0.85 * 29.7 + 0.15 * 47.9 = 32.43 MJ/kg

HHV in MJ /kmol = 0.85 * 1366.2 + 0.15 * 5460.8 = 1980.39 MJ/Kmol

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