Active the coil so as to fire fuel. Record temperature every 30 seconds awaiting utmost temperature is reach and after attain utmost temperature read temperature after every 5 minutes. These temperatures are necessary to description for the heat exchange by jacket water. Later on remove bomb as of calorimeter, release the gases and take apart the bomb. Collect and weigh iron fuse wire which remains. For getting precise effect the bomb should be washed by distilled water and washings titrated to get the quantity of nitric acid and sulphuric acid produced.
Amendment are prepared for small quantity of heat transfer which occur. For creation the calculations a curve of temperature is plot by time. Decide the charge of temperature rise before firing. Also, conclude the rate of temperature drop after the utmost temperature is reach. Cooling correction might be added to calculated temperature increase. Heat balance can be apply as, Heat released through fuel through combustion + Heat released with combustion of fuse wire = Heat absorbed through water and calorimeter.
For receiving heat absorbed through calorimeter the water equal of calorimeter is use which can be determined through burning a fuel of known calorific rate. Commonly benzoic acid and napthalene have calorific value of 6325 kcal/kg and 9688 kcal/kg are being use for finding water equal of calorimeter.