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Comparing the enthalpy changes of combustion of different alcohol’s

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Introduction

Comparing the enthalpy changes of combustion of different alcohol's PLANNING Apparatus The apparatus I will use during this experiment will be: - Heat Proof mat - Clamp - Retort Stand - Copper can - Measuring cylinder - Thermometer - Alcohol's (Methanol, Ethanol and Propanol) - Water - Bunsen Burner - Safety glasses - Access to balance - Draught Shield Quantities of materials required The only Quantity that I know I will use will be the 50ml of water. Method The Diagram below shows the apparatus set up for burning a liquid fuel. ...read more.

Middle

Continue heating until the temperature has risen by 15oC - 20oC. Do not let the thermometer touch the bottom of the copper can as this is the hottest part of the can and so the experiment would be unfair. - Extinguish the burner and immediately weigh the fuel burner to note the mass of fuel burned - Keep stirring the water and note the highest temperature reached. - Subtract the starting spirit burner weight from the second to retrieve the amount of fuel burned within the experiment. - Clean the copper can of any carbon on the outside with water and a cloth. ...read more.

Conclusion

may easily catch fire - Vapors may cause headaches and dizziness and can irritate the eyes and skin - Wear eye protection - The room should be well ventilated The plan I have devised is likely to provide precise and reliable results as I have carried out the experiment myself and written down a step by step procedure of what I did when I carried out the experiment myself. The points are easy and clear to understand, so that any student would be able to follow them. The sources I have used to devise my plan are: - Hazard cards - Chemical ideas - Salters advanced chemistry - Worksheet DF1.2 ...read more.

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