1c. what do we get from burning fuels?
2.Two pupils used different kinds of metal for the electrodes to see which combination of metals gave the highest voltage.
Write down two things they should do to make sure their investigation is a fair test,
3.Hydrogen can beused as a fuel for cars and other vehicals.
a.Why does hydrogen produces less pollution than hydrocarbon fuels when it is burnt?
b.Give 2 disadvantages of using hydrogen as a fuel.
Originally posted 2009-03-26 03:35:11.
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Oxygen
1c energy and CO² (carbon dioxide)
3a does not produce CO²
3b has low energy content.
Is hard to store in sufficient quantity in a small enough space.
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Oxygen
1c. Cardon monoxide
2. The metals need to be the exact same size and all atmospheric conditions need to be the same.
3. hydrogen produces water vapor, I think, when it is burned. Disadvantage of using hydrogen is fuel cells and where to fill up.
Greetings!
Your somewhat of a brassy person. Not only do you want us to do your homework, but are not even attempting to be original enough to make us think that you might even be remotely interested in learning something.
Learn this then, I teach at a University. I am sure I can speak for all professors when I say, Young Lady! People like you cause people like us to make your parents very unhappy people when you come to our classes.
Good Luck
Disadvantages
Fuel cells are currently very expensive, but since they have a simple construction, mass production costs would become extremely low.
Prototype fuel cells last only 1/5th as long as would be needed to make fuel cells cost-effective.
They are energy losers because it costs more to produce hydrogen than is earned by using hydrogen in fuel cells:
Electricity generated by fuel cells in cars costs thousands of dollars per kilowatt: This would have to fall by a factor of 10 for fuel cells to become economically viable
1c. heat which can be transformed into steam and then electricity. we also get byproducts like water vapor and co2
2- all variables such as temperature, medium, lenght of test, etc.
3 a. it has no carbons and therefore cannot form CO2 a geeenhouse gas- but I think the earth is warming with or without human activity
3b. it requires either constant refueling or a very heavy storage tank capable of storing very high pressures. the range of the car is still very small compared to gasooine vehicles.
3b- there are not currently any refueling stations- except in LA where the locals are running a test fleet.
Oxygen
1c- Energy in the form of heat, Carbon Dioxide and Water, plus some unburned fuel vapors and Carbon Monoxide and other gases from incomplete burns. .
2 – Are the metals pure? (Not contaminated with impurities from other metals or substances that will change the results)
Use the same measurement of voltage for each test.
3-Hydrogen can be used, but is not typically used now due to lack of hydrogen sources and cars that are for sale that burn hydrogen.
a. Hydrocarbon fuels burns to form the products in 1c. Hydrogen will not produce greenouse gases nor hydrocarbon vapors…only water and perhaps hydrogen itself, if not completely burned.
b. lack of hydrogen sources and cars that are for sale that burn hydrogen.