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Topic: Chemistry lab planning?!  (Read 7553 times)

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wonzz

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Chemistry lab planning?!
« on: March 06, 2006, 03:03:19 PM »
hi there...
few days ago.. i got a question from my chemistry teacher..
and i still dont get this one.. ???
'Testing the energy from liquid fuels'
this is what i have got...
how do i write a planning on this?
this is my first time to write the planning..so i need some helps.. ;D
and what is a aim of this experiment?

hmmmm... :-\
anyway thx  ;)
« Last Edit: March 06, 2006, 03:11:01 PM by wonzz »

Offline Mitch

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Re:Chemistry lab planning?!
« Reply #1 on: March 06, 2006, 05:33:17 PM »
What kind of energy? Electric? Explosive?
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wonzz

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Re:Chemistry lab planning?!
« Reply #2 on: March 06, 2006, 06:49:52 PM »
i dont know!! thats the problem  :-X
she just told us that it is about energetics...
so... maybe about enthalpy or entropy i guess...

Offline mike

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Re:Chemistry lab planning?!
« Reply #3 on: March 06, 2006, 06:54:08 PM »
Are you using a bomb calorimeter?
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wonzz

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Re:Chemistry lab planning?!
« Reply #4 on: March 06, 2006, 07:02:02 PM »
oh!! so to test the energy from the liquid fuels
i can use bomb calorimetre as an apparatus!!
i have to write aim, hypothesis, apparatus and etc. for my planning... :o
it is toooo hard for me as this is my first time to write a planning and
i am not that good at english..  :P

thx... ;D
« Last Edit: March 06, 2006, 07:02:59 PM by wonzz »

Offline mike

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Re:Chemistry lab planning?!
« Reply #5 on: March 06, 2006, 07:09:38 PM »
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
« Last Edit: March 06, 2006, 07:12:49 PM by mike »
There is no science without fancy, and no art without facts.

wonzz

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Re:Chemistry lab planning?!
« Reply #6 on: March 06, 2006, 07:15:04 PM »
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  :)
« Last Edit: March 06, 2006, 07:16:03 PM by wonzz »

Offline mike

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Re:Chemistry lab planning?!
« Reply #7 on: March 06, 2006, 07:25:21 PM »
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.
There is no science without fancy, and no art without facts.

wonzz

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Re:Chemistry lab planning?!
« Reply #8 on: March 06, 2006, 07:34:10 PM »
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

Offline mike

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Re:Chemistry lab planning?!
« Reply #9 on: March 06, 2006, 07:38:49 PM »
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.
There is no science without fancy, and no art without facts.

wonzz

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Re:Chemistry lab planning?!
« Reply #10 on: March 06, 2006, 07:42:27 PM »
well thx for helping me  :)
btw i dont know much about  the chemistry yet!
but its quite fun id better working hard :-*
and i should ask my chem teacher or my friends tomorrow!
then maybe i might get more information about this one!!

thx again
CHEERS~!
« Last Edit: March 06, 2006, 07:44:51 PM by wonzz »

Offline mike

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Re:Chemistry lab planning?!
« Reply #11 on: March 06, 2006, 08:08:18 PM »
Good luck, and maybe post the procedure of the experiment and some of your results so I can have a look.
There is no science without fancy, and no art without facts.

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