Bomb Calorimeter
| Formula / Notation | q = C_v·ΔT; q_rxn = −q_cal |
|---|---|
| Also Known As | Constant-volume calorimeter, combustion calorimeter, oxygen bomb calorimeter |
What is Bomb Calorimeter?
A bomb calorimeter is a constant-volume calorimeter used to measure the heat of combustion of a substance. The sample is placed in a strong steel vessel (the "bomb") filled with oxygen under pressure and ignited electrically. The heat released is absorbed by a surrounding water bath, and the temperature change is used to calculate the enthalpy of combustion.
Formula & Notation
Other Names / Synonyms: Constant-volume calorimeter, combustion calorimeter, oxygen bomb calorimeter
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A bomb calorimeter is a constant-volume calorimeter used to measure the heat of combustion of a substance. The sample is placed in a strong steel vessel (the "bomb") filled with oxygen under pressure and ignited electrically. The heat released is absorbed by a surrounding water bath, and the temperature change is used to calculate the enthalpy of combustion.
Bomb calorimeters are used to determine calorific values of fuels, food energy content (Calories), explosives characterisation, and thermochemical data for industrial processes. They provide the most accurate measurement of heats of combustion for solids and liquids.
The high-pressure oxygen atmosphere inside a bomb calorimeter makes it an explosion hazard if the sample amount is excessive, the bomb is not properly sealed, or combustible gases are accidentally introduced. Always follow manufacturer's loading limits. Perform leak tests before each run.
The formula or notation for Bomb Calorimeter is: q = C_v·ΔT; q_rxn = −q_cal