Question

explain the construction of a calorimeter.... write brief answer

Answer 1

 

 

Construction of a bomb calorimeter - A bomb calorimeter is a steel vessel which is coated from inside with gold or platinum to avoid oxidation of steel during the chemical reactions. The vessel is fitted with a tight screw cap and it contains two electrodes R1 and R2

 

Working  - The small amount of substance under investigation is taken in a platinum cap. The vessel is filled with excess of oxygen at a pressure of 20 to 25 atmospheres and then sealed. This apparatus is dipped in an insulated water bath which is provided with a mechanical stirrer and a thermometer. The initial temperature is noted and the final temperature is recorded from the thermometer in the water bath. The heat combustion at constant volume can be calculated by