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amid [387]
3 years ago
7

I need the answer please

Engineering
1 answer:
Ghella [55]3 years ago
7 0

Answer:

Explanation:

I think the answer would be 1/8

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A 100 meter dash is run on a track in the direction of the vector = 2 + 7 . The wind velocity is = 5 + km/hr. The rules say that
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3 years ago
An automotive fuel has a molar composition of 85% ethanol (C2H5OH) and 15% octane (C8H18). For complete combustion in air, deter
slava [35]

Answer:

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

therefore the moles of ethanol and octane

ethanol =  0.85 / 46

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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LHV  of (C8H18). = 44.8 mj/kg * 114 kg/kmol = 5107.2 MJ/Kmol

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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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2 years ago
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Explanation:

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3 years ago
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