# The Initial Mass of Spirit LampInitial mass is

The Alcohols ( Total number of carbon atoms constituting each alcohol in the series ) The alcohols with the general formula CnH2n + 1OHranging in order from methanol to pentanol will be manipulated. Of course, it can also be said that the total number of carbon atoms are being manipulated. Now, by choosing to collect data on alcohols in succession in the homologous series would show a how changes in even a single carbon atom can affect enthalpy of combustion. For instance, propanol would give out the result of enthalpy of combustion in an alcohol with 3 carbon atoms,     butanol would give out the result of enthalpy of combustion with 4 carbon atoms.. and so on.Change in mass of alcohols during combustion Total Mass of Alcohol combusted = Final Mass of Spirit Lamp – Initial Mass of Spirit LampInitial mass is nothing but total mass of spirit lamp with each respective alcohol before adding heat.Final mass would be the mass of the alcohols after being heated for set amount of time. Total mass of alcohol combusted can be found using the formula above The surge in temperature this investigation, the factor that is most important is the change in temperature  (?T). The temperatures final and initial are important, but not as important as the change ( hike ) in temperature (?T) as the change in temperature has a direct effect on the dependent variable in this investigation. Temperature Rise (?T) = Final Temperature – Initial TemperatureNow, the best thermometer for this would be an alcohol thermometer, through which the recording of the inital temps and final temps could be done. This can be considered as the most important one among the constant variables. The degree of heat given out by an alcohol depends upon which alcohol is used, and these varying amounts of heat from different alcohols will raise water’s temperature by a constant amount (?T).The mass of the alcohols lost will vary in order to increase the water temperature by this set constant temperature. (?T) 33 ?C is the set temperature change/surge to be kept constant. Calorimeter’s Bottom and the wick’s distance from it This distance should be kept the same ( constant ) and is crucial for the experiment. There would be an increase in heat loss to the environment if the distance gets bigger and because of this the amount of heat that would be able to reach the calorimeter’s bottom would reduce. Thus yielding a reduced hike in temperature of the water (?T), and obviously this would result in achieving a wrong (?T).Distilled water’s mass There should be no change in the mass of the water in the entirety of this investigation. Volume of water is kept the same. Now, for this experiment, it was agreed upon to take the constant amount as 100cm3 as this would make the calculations simpler because it is a known fact that water has a density of 1g/cm3  Distilled Water’s Mass =   Volume of Distilled Water x Density of Distilled Water