Gcse Isa Chemistry Calorimetry

Hypothesis I believe that alcoholic compounds with bigger congress formula mass will release more energy in combustion reaction than the less(prenominal) alcoholic hydrocarbons compounds. Equipment Different types of alcohols in intent burner (CH4, C2H6, C3H8, C4H10, C5H12), Thermometer, piss, beaker, scale, measuring cylinder, tripods, clamp, gauze, heat mat, lighter or matches. Hazard almost of alcohol we using are flammable, irritant, toxic and harmful. 1 provide spirit burners which have removable trumpery caps, this makes it easier and safer to extinguish the flames. Make sure the wick fits tightly in the wick pallbearer and that the wick holder fits tightly in the burner. 3 Fill and label spirit burners or dropper bottles with alcohols in call down of the experiment.Read this Practice trial run Chem 105Ensure any excess alcohol is wiped turned the ramp of the burners. 5 careful considerations must be given on igniting the alcohols. The spirit burners must be kept upri ght when lighting. Do not tip onto the side. 6 make sure the alcohols are kept apart from any source of heat. dont burn your self by touching any flames or hot pee 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 under the beaker and ignite it 3- Keep stirring the water, when the temperature reach 50? Cturn off the flame. 4- Reweigh the burner and workout the difference. Repeat the same steps 3 times 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 submit to work out theenergy released from each alcohol by applying this calculation q = (specific heat capacity of water 4. 2) x mass of water(g) x ? t ch ange in temperature(? C) Then divide the answer by the used alcohol to find out the released energy kJ/g Table Energy 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 clean test? The answer is the same as the control variables * Volume of water (100ml). * Temperature rise to 50? C. * comparable 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.