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Can We Grow Electricity?! Zhi Wei Ngion, Tiffany Park, Leo Siha, Amy Wan, Sherry Zhang G4 Group # 1 G4.

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Presentation on theme: "Can We Grow Electricity?! Zhi Wei Ngion, Tiffany Park, Leo Siha, Amy Wan, Sherry Zhang G4 Group # 1 G4."— Presentation transcript:

1 Can We Grow Electricity?! Zhi Wei Ngion, Tiffany Park, Leo Siha, Amy Wan, Sherry Zhang G4 Group # 1 G4

2 Introduction Generating power produces – Pollution – Global warming Lemon and potato as power sources: – Clean – Renewable – Biodegradable

3 Physics Experiment Voltage output of lemon & potato batteries How time affects the batterys effectiveness

4 Physics Data Presentation Experiment I day 1day 2 lemonvoltage ± 0.001VlemonVoltage ± 0.001V Average0.991Average0.969

5 Physics Data Presentation PotatoVoltage ± 0.001VPotatoVoltage ± 0.001V #10.808# #20.895# #30.928# #40.938# #50.992# Average0.912Average0.830

6 Physics Conclusion Lemon batteries potential difference (voltage output) are relatively larger Average potential difference (voltage output) of the batteries decrease as time increases

7 Chemistry How do lemon batteries create electricity? Oxidation-reduction (redox) These reactions involve the transfer of electrons between substances. Redox reactions release energy, and this energy can be used to do work if the reactions take place in a voltaic cell.

8 The cell potential is a measure of the difference between the two electrode potentials. The standard electrode potentials, E o, in aqueous solutions of Cu and Al are and –1.66 V with reference to hydrogen H. The cell voltage of the lemon battery is the difference, U = (+0.34) – (-1.66) = 2 V. Chemistry Standard Electrode Potentials

9 Chemistry To investigate the relationship between the acidity of the lemon and its voltage output. Experiment

10 Experiment II China Voltage ± V pH ± 0.1Thailand Voltage ± V pH ± Average Average Chemistry Data Presentation

11 Chemistry Data Presentation

12 Chemistry Data Presentation

13 UNABLE TO PROVE: Linear relationship between voltage and acidity The conditions of the electrodes will affect the voltage of the battery Chemistry Conclusion

14 To investigate the geographic origins & mass of the lemons. Also the relationship of the mass of lemon with its voltage output. Experiment Biology

15 Biology Lemons from the USA Mass ± 0.1g Voltage ± V pH ± g g g g Average g Data Presentation

16 Biology Lemons from China Mass ± 0.1g Voltage ± 0.001V pH ± g g g g Average g Data Presentation

17 Biology Data Presentation

18 Biology Data Presentation

19 Biology Conclusion Both sets of data are randomly scattered Mass does not effect the voltage output of the lemons

20 Conclusion and Evaluation Statistic values 20W light bulb – 2.5 mg of coal (1 second) – 2.5 kg of coal (11.5 days) cost: 2.5 RMB 108 lemons can provide the amount of voltage to power 27 LED The light energy given out by 27 LEDs equals to 120W light bulb 234 lemons can provide the amount of voltage to power 120W light bulb 108 lemons (from mainland China) cost 216 RMB Physics

21 Effectiveness of lemon batteries – Individually and in groups Time factor: – Lemons biodegrade Lemon batteryVoltage ± 0.1V Series of batteries Voltage ± 0.1V Total voltage 2.5 Conclusion and Evaluation Physics

22 Effects of electrodes on the lemon battery - Surface oxidation - Electrochemistry potential SubstanceStandard electrode potential Lithium 3.04 Magnesium 2.37 Aluminum 1.66 Zinc 0.76 Iron 0.44 Copper 0.34 Silver 0.80 Conclusion and Evaluation Chemistry

23 Economic costs for the electrodes Effects of acid in lemon on the electrodes - Corrosion of metal Requirements for the redox reaction -Must be electrically connected -Could be provided by just the lemon juice MetalsCost (RMB per ton) Magnesium15.4 thousand Aluminum15.3 thousand Copper (electrolyze)59.0 thousand Zinc16.4 thousand Conclusion and Evaluation Chemistry

24 Lemons can be genetically altered to become smaller in size therefore more space efficient lemons are only able to bear fruit year round when grown in mild climate Transportation of lemons Areas to mass produce lemons 1. Building Greenhouses 2. Opening more areas for plantation 3. Not enough space Effect of mass production of lemons on other plantation Use of water Conclusion and Evaluation Biology

25 Not enough lemons affected accuracy of data 1. Variety of sizes 2. Variety of locations Time 1. Grow lemons under different conditions (e.g. soil pH) Conclusion and Evaluation Biology

26 Thank You!


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