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To compare the energy released when different fuels are burned.

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Introduction

Aim: To compare the energy released when different fuels are burned. Predictions: I predict that Butanol will release the most energy when it is burned, because it has the biggest structure, and will therefore need to use more energy to break the bonds holding it together. Plan: Apparatus: * Spirit burner containing different alcohol's * Measuring cylinder * Thermometer * Balance * Clamp stand * Boiling tube 25cm3 of water will be put in to a boiling tube. ...read more.

Middle

A thermometer will then be placed in the boiling tube. The temperature of the water will then be taken. The spirit burner will then be placed under the boiling tube (each time making sure it is the same distance between the lamp and boiling tube.) The spirit lamp will then be lit and the thermometer watched carefully. Once the temperature has risen by 20oc, the flame will be extinguished by quickly placing the lid of the burner over the flame. ...read more.

Conclusion

Difference in weight (g) Rise in temperature oc Ethanol 162.70 162.13 0.57 20 Methanol 165.71 165.50 0.21 20 Propanol 159.80 159.20 0.60 20 Butanol 166.69 166.22 0.47 20 1. 2. 3. 4. Any Improvements? If I did this experiment again, I would repeat each experiment at least 5 times, so I could get an average and be more precise with my answers. I would also try and cut out as many unnecessary drafts as possible, by shutting the windows and doors, as this may have affected my results by taking some heat away from the burner. ...read more.

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