Your current race car burns 4 liters of RON100 gasoline in your IC engine during an endurance race. By what amount [kg] you may lower your fossil carbon dioxide emissions by using a E85 mixture (per volume) as biofuel? Assume complete combustion and the same amount of chemical energy needed to run your engine on E85 fuel during an endurance. Consider the properties below. round to 2 decimal places and number format be like "3.14". Please use the following format: 12.34
![Three-column fuel-property table headed 'density' [kg/m³], 'fossil CO2 emission' [kg/L], and 'Calorific Value' [MJ/kg]. The 'pure Ethanol' row reads 789, 0, 26.71. The 'Gasoline' row reads 740, 2.32, 43.88, respectively.](/media/questions/151_1.jpg)
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Three-column fuel-property table headed 'density' [kg/m³], 'fossil CO2 emission' [kg/L], and 'Calorific Value' [MJ/kg]. The 'pure Ethanol' row reads 789, 0, 26.71. The 'Gasoline' row reads 740, 2.32, 43.88, respectively.
- 7.30Correct
Official answer
7.30
The mixture is 85 volume-% Ethanol. The density has to be considered.
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- FSA 2021 · cv · quiz 15