Leo C asked:


if i use ethanol as a fuel, how can i calculate how much energy is released per gram of ethanol??
i conducted an experiement where:
the mass of the burner (containing the ethanol) is 204.03 grams.
the initial temperater of the water (being heated by burner) is 20.7 degrees celsius.
the final temeprature of the water is 42.3 degrees celsius.
the final mass of the burner is 203.20

so how can i calculate how much energy is released per gram of ehtanol?

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1 Comment so far

1. SciMann June 18, 2009 3:59 pm

   _____Heat of combustion

   heat / g = (4.18 J/gC * g water * (42.3 – 20.7)C) / (204.03 -203.20)g

   you need to supply how much water
   assumption is that ALL heat is transferred to the water; not a good one!

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