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What amount of ethanol is needed to produce the equilavent a liter of petrol energy wise?
Wiki User
∙ 14y ago
Ethanol contains less than half the energy per litre as is contained in an equal amount of petrol (Petrol= 77.3 MJ/kg, Ethanol = 29.7 MJ/kg.) This does nor account for the higher production energy costs associated with production of fuel grade ethanol from food grade crops like wheat or corn.
You would have to burn more than twice the volume of fuel in an ethanol powered car.
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoThe energy in petrol is 42 Megajoules per kilogram, and 1 litre weighs between 0.71 and 0.77 kilogram. So 1 litre contains 30-32 Megajoules.
In a typical petrol engine about a quarter of that energy is converted into mechanical power to drive the car. The rest comes out of the exhaust pipe and the radiator as heat energy.
Wiki User
∙ 14y agoits approximately 85 mega
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Is ethanol potential or kinetic?
Since ethanol by itself is a liquid that is doing nothing, it is POTENTIAL energy. You need to take some action to extract the energy.
What are the concerns of using ethanol as a fuel?
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
How much does ethanol cost?
There is not one constant answer to this. The market on ethanol changes every day. See the link to the Ethanol Market page below to follow up today's prices and recent trends.
What fuel produces more energy per gram burned- Ethanol or paraffin?
paraffin
Is ethanol carbon neutral or not?
No Ethanol is not carbon neutral as I am about to show you Photosynthesis: 6H2O + 6CO2 => C6H12O6 + 6O2 Fermentation: C6H12O6 => 2C2H5OH + 2CO2 Combustion: 2C2H5OH + 6O2 => 4CO2 + 6H2O by looking at this it would appear that Ethanol is carbon neutral because Photosynthesis uses 6CO2 per mole of glucose, fermentation and Combustion produce 2CO2 and 4CO2 making 6CO2 per mole of glucose but what makes ethanol not carbon neutral is that you have to burn fuel to grow and harvest the crops for fermentation, fermentation requires heat for the reaction to take place, heat comes from energy and energy comes from fossil fuels. ----====---- Only industrial scale ethanol fermentation requires additional heat. Fermentation is a biological process, in which yeast consuming sugars generates alcohol and heat. Small scale ethanol production with hand picked feedstock, is indeed Carbon Neutral.
What is a major drawback of ethanol?
Two drinks and I have to get a taxi home. As an energy source, the process of concentrating ethanol consumes a lot of energy. It depends on who you believe, but the amount of energy consumed may exceed the amount of energy in the ethanol created. If that's so, then ethanol may be a useful form of energy (in the same was as electricity is), but not a useful source of energy.
How does ethanol hurt the environment?
It takes more energy to produce ethanol than the fuel itself yields.
How much energy does it take to produce a gallon of ethanol?
couple hundred
Which material would require the least amount of energy to change 1kg from a solid to a liquid ethanol aluminum propane or water?
ethanol
What energy resources can produce the most amount of energy from the smallest amount of fuel?
Nuclear reactions.
Does petroleum produce energy?
Yes, a huge amount
What are examples of bad biofuels?
Corn derived ethanol. Anything that requires more energy to produce than is derived from the final product.
What is energy sprawl?
energy sprawl is the amount of land needed to produce clean energy
What is a mechanical Effeciency?
The amount of work used to produce energy
What is the relationship between appliances power rating and the amount of heat it produce?
power rating is the rate of moving energy their relationship in the amount of heat it produce it divided by time to move that much energy
What are the advantages of heat energy?
Heat energy is the amount of heat used to energize or to produce heat.
What are some pros on ethanol?
Pro: Made from a renewable sorce! Con: It takes more energy to make then it can produce. Therefor it isn't a great substation...
