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Here's An Example: The negative and positive protons get together and make Ionization Energy
Distillation. Ethanol can be easily collected from water using distillation up to 97% purity.
For every gallon of gas containing 10% ethanol (referred to as E10 gas), it will contain 1/10th gallon of ethanol (about 12 ounces by volume). Ethanol is primarily used to oxygenate the gas and replace the chemical MBTE, which pollutes groundwater. HOWEVER, since most ethanol in the US comes from corn, it is important to note that using ethanol in gasoline causes GREATER pollution than just gasoline alone. This is because it actually takes more energy to produce corn based ethanol than is extracted from it. Until better technologies for ethanol production are available (e.g. algae), it is best for the environment to avoid gas containing ethanol if possible (some states mandate it).
The molar mass of ethanol is 46g/mol. Using the formula mass = (molar mass) x (no. of moles), the mass of 0.5623mol of ethanol is approximately 25.9g.
Measure a volume of water and place it in a thin metal container with a lid, stirrer and thermometer. Pour some ethanol in a spirit lamp and weigh the spirit lamp with ethanol and cap. Ignite the lamp and place it under the metal container to heat up the water. Insulate to minimize heat losses. When the temperature rises by, say, 15 degrees stop the lamp and close it (to avoid further evaporation of ethanol). Weigh the lamp again to calculate the mass of ethanol used up. The energy transfered to water can be measured using the equation Q = mc(T2-T1), where: Q = energy supplied, in J m = mass of water, in Kg c = specific heat capacity of water (find it in a data book), in J/KgK T2 - T1 = change in temperature, in K, in our case 15 degrees By having the mass of ethanol used, say x grams, one can say the energy, Q, was supplied by burning by burning x grams. By simple proportion, one can find the energy that would be given on burning one mole (46g) of ethanol. This would be the heat of combustion in KJ/mol.
There are none Negative aspects.
There are none Negative aspects.
Ethanol has many considerations as far as its use as an automotive fuel.\: # On the plus side it is a liquid and easily handled in the present transportation and delivery systems. # On the negative side: * Ethanol from food crops removes food from the system * It requires more energy to produce ethanol than the automobile gets out of the ethanol (Crops require fertilization and fertilizers are made using hydrocarbons, ethanol is made by fermaentation, the fermentation products require distillation, the ethanol is a less efficient fuel than gasoline) * Ethanol combustion creates tail pipe emissions of aldehydes and ketones at levels not present in hydrocarbon fuelled autos * There is not enough land to produce enough ethanol fuel while maintaining food production * Ethanol from waste cellulose is not being pursued asa production route
its cold hahhaha knee slapper
A positive impact of airplanes is that we can ship goods from place to place, rather than using a boat or a truck. A negative impact on airplanes is the pollutants from their engines and the amount of wind they use.
Solar energy is a renewable energy source, using it, we release less co2 into the atmosphere, thus stopping global warming. (solar powe is good)
Here's An Example: The negative and positive protons get together and make Ionization Energy
Ethanol, due to it's inherent properties as a fuel. Brazil produces alot of Ethanol and is about to become energy independent because of it. But check this out: Crops such as corn, Sugar cane, beets, etc.. are converted to alcohol. In the case of corn to ethanol, it is energy negative. It takes 71% more energy to produce ethanol than is obtained from the ethanol. Also, using grain such as corn for fuel precludes it from being used as food for humans or livestock. It is also hard on the land. In United States corn production, soil erodes some 20-times faster than soil is formed. Ethanol has less energy per volume than does gasoline, so more gasoline has to be purchased to make up the difference. Also, ethanol is not environmentally friendly, as advocates would like to believe. Pimentel (1998) states: "Ethanol produces less carbon monoxide than gasoline, but it produces just as much nitrous oxides as gasoline. In addition, ethanol adds aldehydes and alcohol to the atmosphere, all of which are carcinogenic. When all air pollutants associated with the entire ethanol system are measured, ethanol production is found to contribute to major air pollution problems." With a lower energy density than gasoline, and adding the petroleum energy used to plow, plant, cultivate, and transport the corn for ethanol production, ethanol does not save gasoline nor does it's use reduce atmospheric pollution. A comprehensive study of converting biomass to liquid fuels by Giampietro and others (1997) concludes: "Large-scale biofuel production is not an alternative to the current use of oil, and is not even an advisable option to cover a significant fraction of it." Solar Energy is the only way to fly ;-)
Renewable energy is a term applied to energy resources that replenish them self. Sustainable energy is essentially the same thing, energy resources that can be used indefinitely. The only difference to me might be the connotations, trees can be seen as a renewable resource but might not be the best sustainable option because you have to release carbon into the atmosphere to obtain energy. Solar energy could be called sustainable energy because your not having a negative impact by using it.
Power Save manufacturers products that strengthen the energy efficiency of most houses. Power Save products can decrease a consumers electrical use, make appliances more efficient, and provides less negative environmental impact when using the product as opposed to when not using it.
No greenhouse gas emissions.No pollution.A clean renewable source of energy.
The main negative impact - is on employment. Many companies realised that by using robots to take over production - they can reduce their workforce - thus reducing operating costs.