Answer Happy

this is about bioful
Problem 1 (30 points): Biofuel Ethanol (C2H.O) is a biofuel that can be blended with gasoline to be used in modern gasoline engines. (1) Calculate the energy content (Lower Heating Value, LHV) of ethanol per liter, using the following thermodynamic data. Given molar mass of ethanol 46.07 g/mol, density of ethanol 0.789 g/cm² Substance Enthalpy of formation @298K (kJ/mole) Ethanol -277.7 CO2 -393.5 H2O(g) -241.8 02 0.0 Sugarcane is a tall perennial grass with fibrous stalks that are rich in sugar. In the northeastern area of Brazil, this grass is harvested once a year and stalks of the sugarcane are transported to the ethanol plant to produce ethanol. Some irrigation and nutrient addition are necessary to increase the crop yields. It is known that per hectare (100mx 100m) on arable land, the sugarcane field has the energy input requirements (in GJ) as shown below in pie chart (a). The hectare yields approximately 8000 kg of sugarcane. The sugarcane is then processed in an ethanol plant to make almost pure ethanol. In such biomass conversion process, each liter of ethanol requires 3 kg of sugarcane. Per 1000 liters of ethanol, the ethanol production process requires the energy inputs (in GJ) as shown in the pie chart (b). For simplicity, ignore the energy impact of by-products resulting from sugarcane-ethanol production. Others, 1.2 Transportation, 2.5 Others, 6.0 Machinery, 8.0 Electricity, 4.5 Fertilizer, 6.0 Fuels, 10.5 Distillation, 10.0 (a) Energy requirement (in GJ) per hectare for sugarcane. (b) Energy requirement in GJ) per 1000 liters of ethanol for the sugarcane-to-ethanol process. (2) From sugarcane planting, harvesting to ethanol production, does the ethanol provide more energy than it consumes? 1