Calculating Heat Value for Alcohol Combustion

[hurricane_xx]

Hey.
We have an assignment where we're investigating combustion of types of 'fuels'. I chose 4 alcohols- ethanol, methanol, propanol and octanol. I did a few experiments, with one testing the heat produced

Could you please explain the formula for the heat value- not quite sure what its called :| I need to find out heat produced kj/mole. It was a test where I burned a water-filled calirometer with the alcohol and recorded the waters temp evry 15 seconds under a period of time, and the measurements of the alcohol lost.

The teacher couldn't explain it. He just confused me even more.. well if it helps, all i remember about the formula is it contained delta H. haha I am a little clueless. sorry.

Thanks :)

 

[symbolipoint]

Do your work in units of calories. Somewhere, you need to find how to convert calories to joules. You must know the meaning of 1 calorie; your calculation of results should be uncomplicated. Amount of heat needed to raise temperature of one gram of water by one degree centigrade = calorie