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Comparing the enthalpy changes of combustion of different alcohol's and fuels.

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Introduction

Comparing the Enthalpy Changes of Combustion of Different Alcohol's and fuels Plan Introduction In this experiment I will attempt to find out the energy needed to raise the temperature of 1g of water by 1oC using different fuels and alcohol's. This will enable us to determine the change in enthalpy for the different substances. Method * Firstly I will measure 200cm3 of water out into a copper coulometer * Then I will half fill a spirit burner with the required fuel, the burner must have a lid to stop ...read more.

Middle

recorded and the wick of the burner ignited * After securing the draft excluder with heat proof gloves and leaving a small gap at the bottom for air to get in I will stir the water to insure that the temperature rise is equal throughout the 200cm3 of water. * Just before a suitable temperature rise e.g. 20oc the flame will be extinguished with the burner cap to immediately stop the consumption of fuel. ...read more.

Conclusion

The large bottles containing the fuel for distribution will be kept as far away from the experiment as possible preferably in a fume cupboard preventing fumes from being ignited. Fair Test To make certain that the results are fair I will always use fresh cool water and leave time for the copper coulometer to cool to room temperature, try to keep wick lengths and distance between burner and coulometer regular. Will keep size and placement of the draft excluder the same throughout the experiment and keep all relevant apparatus the same. Results Hexane Using the data book I will calculated the expected Craig Davis 08/05/07 Fuels Investigation 1/2 ...read more.

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