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Chemistry lab planning?!

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mike:
Well the bomb calorimeter can tell you the calorific value (heat of combustion) for liquid fuels (or solid fuels for that matter). I don't know if this is what you want to do though.

For example you could test a range of ethanol blended diesel fuels using a bomb calorimeter.

You can look at my earlier post to see how to write a report:

http://www.chemicalforums.com/index.php?board=4;action=display;threadid=6847;start=msg30791#msg30791

wonzz:
thanks mike  ;D
sorry for keep asking but

'Testing the energy from liquid fuels'
how can i deduce the 'aim' from this one?
 

ah!! thank you for the links  :)

mike:
You haven't really given us enough information yet.

However as an example:

If you were investigating the addition of ethanol to diesel fuel and comparing their relative calorific value your aim could be to determine the calorific value of ethanol-diesel fuel mixtures of varying composition by bomb calorimetry. Your hypothesis could be something along the lines of; the calorific value of ethanol-diesel fuel mixtures will decrease with increasing amount of ethanol.

You would probably want to expand these a bit as I have just written them quite quickly, and of course you need to adapt them to your experiment.

wonzz:
really thx for your explanation... :)

but
testing the energy from liquid fuels..
that is all that i have got from my chem teacher..
also she told us, we have to write
-list controlled variables (maybe temperature or pressure ?? )
-measure sufficient data..

cheers

mike:
What are your variables then? A bomb calorimeter does not have constant temperature or pressure. However you could vary the constituents of the liquid fuel relative to each other.

I don't know what "meausre sufficient data" is implying, but you would need to measure temperature change presumably and tabulate or even graph this data.

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