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What temperature do I use to calculate enthalpy of combustion??? (Bomb Calorimetry)

I have just completed a bomb calorimetry lab experiment and now need to calculate deltaH for the combustion.

Using the equation: deltaH = deltaU + deltan.RT

I am confused regarding what temperature to use? Do I use the final temp, initial temp, change in temp?

Any help would be greatly appreciated
Original post by callumburns98
I have just completed a bomb calorimetry lab experiment and now need to calculate deltaH for the combustion.

Using the equation: deltaH = deltaU + deltan.RT

I am confused regarding what temperature to use? Do I use the final temp, initial temp, change in temp?

Any help would be greatly appreciated


Try this link. http://www.dartmouth.edu/~pchem/75/pdfs/BombCal.pdf Scroll down to page 5 (Questions and Calculations)
Take the final temperature away from the initial temperature and then use this change in temperature to work out your enthalpy
It's the change in temperature because you are working out the enthalpy required to raise the temperature by that many degrees.

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