Chemistry / Chem 0666 · Atom · ~20 seconds
The Bomb Calorimeter
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A bomb calorimeter measures heat at constant volume, inside a sealed steel vessel built for combustion reactions.
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A weighed fuel sample is ignited by a spark inside the bomb, and the surrounding water warms by an amount revealing the heat released.
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A bomb calorimeter's steel body absorbs a share of the reaction's heat, so its known heat capacity enters the calculation.