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Bomb Calorimeter
Bomb Calorimeter
A type of calorimeter used in very precise measurements of heats of reaction is called the bomb calorimeter. It is used to measure energy changes for reactions that will not happen until they are deliberately initiated, for example, combustions which must be ignited. The reactants are put into the "bomb", which is then sealed and immersed in a large, well-insulated vat of water. When the reaction is set off, the bomb, the water, and any piece of the equipment sticking into the water absorb any heat that is liberated, and the temperature of the entire contents of the vat rises. The stirrer ensures that any heat released becomes uniformly
Enthalpy of Formation
Enthalpy of Formation
The enthalpy of formation is defined as the enthalpy of a substance at a specified state due to its chemical composition1
Enthalpy of Combustion
Enthalpy of Combustion
The enthalpy of reaction in a combustion process is called the enthalpy of combustion (symbolized by hc). The calculation for an enthalpy of combustion is done for 1 kmol (1 kg) of fuel is burned completely at a specified temperature and pressure and can be expressed1:
hc = Hprod – Hreact
Enthalpy
Enthalpy
Enthalpy is the system we use to measure that change in energy of a closed system due to chemical bonds being broken.
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