Show careful heating of the brass bob before it is transferred ti the water in the calorimeter
Answers
A bomb calorimeter is a type of constant-volume calorimeter used in measuring the heat of combustion of a particular reaction.
In the Bomb Calorimeter System, the whole bomb, pressurized with pure oxygen and containing a weighed mass of a sample, is submerged under a known volume of water in the Bomb Calorimeter Vessel. The bomb, with the known mass of the sample, and the oxygen, form a closed system - no gases escape during the reaction. The weighed sample put inside the steel container is then ignited. Energy is released by the combustion and heat from this crosses the stainless steel wall, thus raising the temperature of the steel bomb, its contents, and the surrounding Bomb Calorimeter Vessel filled with water. The temperature change in the water is then accurately measured. This reading, along with a bomb factor, is used to calculate the energy given out by the sample burn.
The Bomb Calorimeter consists of a small cup which contains the sample, the oxygen gas, the stainless steel bomb, water, a stirrer, a thermometer, insulating container (to prevent heat flow from the calorimeter to the surroundings) and an ignition circuit connected to the bomb. By using stainless steel for the bomb, the reaction will occur with no volume change observed.
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