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An Investigation of the Effect of Temperature On the Reaction Rate of Yeast

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Introduction

An Investigation of the Effect of Temperature on the Reaction Rate of Yeast? Results I used the results of the previous years experiments, there were 10 sets of results for a range of temperatures from 10 - 90* C. I put all these results into a table and decided to average the results fro a more accurate picture. I added up all the values for each temperature and divided by how many results there were. For temperatures where no observations were made I did not take an average and when plotted on a graph there were no points to mark at these temperatures. First I plotted a graph using the average volumes, I noticed the correlation was not as strong as I would have expected. I plotted a graph using the actual values of CO2 then found the anomalous results and calculated a new average discounting the incorrect results. ...read more.

Middle

My line of best fit showed a sharp curved correlation, peaking at around 50* and falling to zero at around 90*. However it also showed several points which were quite a way from the line of best fit and 90* seemed to high an end point for a reaction involving enzymes. My second graph showed the actual volumes of CO2 against temperature. I found that the line of best fit still followed a similar course but the end point of my curve was at 80 rather than 90*. This graph showed anomalous results clearly as they stood out from the clusters of values around my line of best fit. From his graph I was able to pick out 7 anomalous results. My third graph showed the adjusted average CO2 volumes, calculated without the anomalous results. These results formed a much stronger correlation than in my previous graphs and my line of best fit was much more like the type of curve I would expect form a reaction involving enzymes, peaking at around 50* and finishing at around 80*. ...read more.

Conclusion

There are many possible reasons for the anomalous results that I found, for example the measurements of temperature or mass may have been incorrect for that observation. There may have been an error when the result was recorded or the equipment may have been set up inaccurately. I f I was doing this experiment I would explore all the variables which may affect this experiment, temperature, mass, measuring errors and recording errors and, by doing preliminary work on the process, find out how best to keep the key factors constant. Overall my analysis of this experiment was accurate, effective and informative however it would be improved by improving the reliability of the results themselves. I also found that my analysis matched my conclusion, the enzymes had behaved as I expected them to , showing that my experiment was successful in proving it's aim. ?? ?? ?? ?? ...read more.

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