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How different amounts of insulation affect the temperature fall of boiled water.

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Introduction

How different amounts of insulation affect the temperature fall of boiled water. Apparatus: * Beaker * Test Tube * Paper Towels * Boiled Water (kettle) * Thermometer * Stopwatch * Bung Diagram: Variable Changed: The variable I am going to change is the amount of paper towels wrapped around the test tube of boiling water. I will start with none and add one each time until there are five wrapped around the test tube. Tanya Ullah 10BG2 Variable Measured: The variable that is going to be measured is the temperature fall of the water after different lengths of time. I will measure the temperature at the start then I will check it every two minutes for ten minutes in different amounts of insulation. Variables Kept The Same: The variables which I am keeping the same to make it a fair experiment are: * the amount of boiled water * the test tube * the type and size of paper * ...read more.

Middle

5. I will continue the experiment by adding one more paper towel each time repeating the experiment so I can find an average of my results. Once I have ended up with four paper towels wrapped around the test tube I will stop. Prediction: I predict that the more paper towels wrapped around the test tube the less the temperature will fall because it will be more insulated. This is due to air been a poor conductor as it is a gas. When the particles are far apart like in a gas it is harder for them to pass energy through but when they are close together like in a solid the energy passes easy. Tanya Ullah 10BG2 A table to show how different amounts of insulation affect the temperature fall of boiled water. Temperature Check After (mins) Paper Towels 0 2 4 6 8 10 0 66 63 60 57 54 52 0 66 61 58 55 53 51 1 ...read more.

Conclusion

Air is a poor conductor as it is a gas and the particles are further apart and it is more difficult for the energy to pass from particle to particle. Whereas in a solid the particles are close together and pass energy easily. Evaluation: When looking at my results table I notice that my repeated results are very similar the biggest difference is 2 . On my first graph the lines of best fit are quite correct but when I look at my second graph I noticed there were two result which didn't fit in with the line of best fit. This may have been because the wraps of paper towels weren't the same tightness on the repeats or that the start temperature I choose was too low. To improve my experiment I could start with a higher temperature or I could do gather more results for example do the test with up to ten paper towels. Tanya Ullah 10BG2 ...read more.

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