Gcse Isa Chemistry Calorimetry

Hypothesis I believe that alcoholic drinkic compounds with bigger congenator formula muckle will release more energy in combustion reaction than the less alcoholic hydrocarbons compounds. Equipment Different causas of alcohols in tint burner (CH4, C2H6, C3H8, C4H10, C5H12), Thermometer, water, beaker, scale, measuring cylinder, tripods, clamp, gauze, heat mat, lighter or matches. Hazard Most of alcohol we using are flammable, irritant, toxic and harmful. 1 provide spirit burners which cod removable glass caps, this makes it easier and safer to extinguish the flames. Make surely the wick fits tightly in the wick holder and that the wick holder fits tightly in the burner. 3 Fill and label spirit burners or dropper bottles with alcohols in advance of the experiment.Read this Practice Test Chem 105Ensure all excess alcohol is wiped off the side of the burners. 5 careful considerations must be given on igniting the alcohols. The spirit burners must be unploughed upright when lig hting. Do not tip onto the side. 6 make sure the alcohols are kept away from any source of heat. dont burn your self-importance by touching any flames or hot water method 1- Fit the beaker inside the tripod, fill the beaker with 100ml of water after measuring it by the cylinder,and take the initial temperature of water by using thermometer, 2- Measure the mass of thefirst burner spirit (Methanol)and record it, Put the spirit burner on the heat-mat nether the beaker and ignite it 3- Keep stirring the water, when the temperature reach 50? C spring up off the flame. 4- Reweigh the burner and workout the difference. Repeat the resembling steps 3 measure and take the average of the alcohol use in burning. 6- Apply the same steps above with the all-different types of alcohol remaining to test (Ethanol, Propanol, Butanol, Pentanol) 7- Finally you use up to work out theenergy released from each alcohol by applying this tally q = (specific heat capacity of water 4. 2) x mass of water( g) x ? t change in temperature(? C) Then divide the assist by the used alcohol to find out the released energy kJ/g Table cypher transferred for alcoholAlcohol name Test 1 (g) Test 2 (g) Test 3 (g) Average (g) Transferred energy (kJ/g) Methane Ethane Propane Butane Pentane Make it fair test? The answer is the same as the control variables * Volume of water (100ml). * Temperature rise to 50? C. * Same starting temperature of the water. * Always weigh the alcohol burner without the lid. Independent variables the type of alcohol Dependent variables transferred energy from the combustion.