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# Burning fuels investigation

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Introduction

Burning fuels investigation Aim My aim is to find out which fuel releases the most energy per mole measured by heating water. Hypothesis In this investigation I will burn alcohols to heat up a beaker of water. I will be burning five fuels which are called Methanol, Ethanol, Propanol, Butanol and Pentanol. In my investigation I predict that the alcohol Pentanol would release more energy than the other alcohols because as the chain length of the alkanes get longer, the more energy is released. Apparatus * Retort stand * Clamp * Measuring cylinder * Thermometer * Heatproof mats * Copper can * Splint * Chemicals(Methanol, Ethanol, Propanol, Butanol and Pentanol) Independent variables * Using the same scales * Same amount of water in copper beaker * Same height of thermometer from water * Temperature of water before experiment * Weight ...read more.

Middle

Then I would use a spirit to light it and put it under the copper can. Then I would heat and stir the water until the temperature has gone up another 10 degrees Celsius. I will then blow out the flame and put the cap on the burner quickly and reweigh the alcohol. After I will repeat this with the next four alcohols. I will also repeat this experiment again. Results 1st Experiment Temp(degrees Celsius) Alcohol Starting mass(g) Mass after heating(g) Energy per mole(kj) 30-40 Methanol 168.34 160.78 555.56 30-40 Ethanol 166.66 164.32 1794.87 30-40 Propanol 166.37 165.66 5915.49 30-40 Butanol 160.48 159.82 6363.64 30-40 Pentanol 166.37 165.85 8076.92 2nd Experiment Temp(degrees Celsius) Alcohol Starting mass(g) Mass after heating(g) Energy per mole(kj) ...read more.

Conclusion

The results obtained were accurate because I calculated the averages which increased the reliability. Furthermore, I ensured the experiment was a fair test because all the points mentioned were taken into consideration providing me with conclusive results to form a firm conclusion. Evaluation In my investigation, there were no unexpected results as all the results follow the expected pattern. When doing an experiment such as this, there are normally scores for experimental or human errors. I considered all the points I mentioned in the fair test carefully and as a result, I believe my outcome was reasonably accurate enough in order to draw a firm conclusion. The way that I would have improved my experiment is that I would have used better and scientific equipments which would help me calculate more accurate and better results. ?? ?? ?? ?? Bhavik Vyas ...read more.

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