Environmental Protection Daily Question 9.12: Participation is rewarded, and an additional prize is given for correct answers!
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This post was last edited by slll611 on 2015-9-18 at 22:51. Choose one that is meaningful, so as to understand our car’s ‘contribution’ to air pollution. Formula for calculating carbon emissions from motor vehicles: Carbon dioxide emissions (kg) = Fuel consumption (liters) × ( ) kg/liter. A 1.1 B 2.7 C 4.95 D 6.0 The correct answer is B 2.7. Those who want to know the reason can check the answer provided by ylb913 on floor 5; thanks to him for that.
B. 2.7--------------------------------------------------------------------------------
Formula for calculating carbon emissions from motor vehicles: Carbon dioxide emissions (kg) = Fuel consumption (liters) × (B 2.7) kg/liter
Formula for calculating carbon emissions from motor vehicles: Carbon dioxide emissions (kg) = Fuel consumption (liters) × (B 2.7) kg/liter. A 1.1 B 2.7 C 4.95 D 6.0
This post was last edited by ylb913 on 2015-9-13 at 12:28. Assuming that each liter of gasoline weighs 0.72 kilograms (which is roughly its density), the carbon content is less than 0.72 kilograms per liter (the exact carbon/hydrogen ratio is not known; gasoline contains saturated hydrocarbons, benzene, and olefins, and the ratio is not far from 1:2. Assuming a carbon/hydrogen ratio of 1:2, the carbon content in gasoline would be 0.72*12/14 = 0.62 kilograms per liter). The molecular weight ratio of carbon to carbon dioxide is 12:44; therefore, the amount of carbon dioxide emitted per liter of gasoline should be less than 0.72*44/12 = 2.64 kilograms. The closest answer is only B.
Formula for calculating carbon emissions from motor vehicles: Carbon dioxide emissions (kg) = Fuel consumption (liters) × (B) kg/liter. A: 1.1 B: 2.7 C: 4.95 D: 6.0 There is a set of formulas for calculating carbon emissions circulating on the Internet; by using these formulas, one can determine how much carbon dioxide is emitted as a result of daily activities. For example, carbon dioxide emissions from driving (KG) = Number of liters of fuel used × 2.7； Carbon dioxide emissions from home electricity use (kg) = kWh used × 0.785 ； The carbon dioxide emissions (in kg) resulting from a long-distance flight of over 1,000 kilometers = distance in kilometers × 0.139… For example, for a car with a 1.6L engine that travels about 10,000 kilometers per year, and assuming it uses 1,000 liters of gasoline, its annual carbon emissions amount to around 2.7 tons. If we consider that each mu of planted forest can absorb 1.83 tons of carbon dioxide, then approximately 1.5 mu of such forest would be needed to offset the carbon emissions generated by driving during that year; the cost of planting 1.5 mu of forest is around 1,200 yuan. Let’s now calculate the carbon emissions of vehicles with different fuel consumption levels. A car with a 4.0L engine that also travels 10,000 kilometers per year, with a fuel consumption of around 20 liters per 100 kilometers, will have annual carbon emissions of 5.4 tons, which is twice that of the 1.6L car. Without taking into account other sources of carbon emissions from daily life, just the emissions from driving alone already exceed China’s average per capita carbon dioxide emissions. The automotive industry is one of those that generate significant amounts of carbon emissions, and the number of cars continues to increase.
Formula for calculating carbon emissions from motor vehicles: Carbon dioxide emissions (kg) = Fuel consumption (liters) × ( ) kg/liter B 2.7
Formula for calculating carbon emissions from motor vehicles: Carbon dioxide emissions (kg) = Fuel consumption (liters) × 2.7 kg/liter B 2.7
B 2.7. . . . . . . . . . . . . . . . . . . . . . .
Option B, 2.7. Right?