Supercooling water


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Supercooling water

  1. 1. By: Alex O’Laughlin <br />And <br />Zach Loza<br />Super Cooling Water<br />
  2. 2. Introduction<br />This experiment will include super cooling water at different temperatures for different amounts of time<br /> We will use 16.9 Fl. Oz. bottles of distilled water<br />We will be doing a few test for each temperature and time to ensure accuracy and precision<br />
  3. 3. Introduction (cont.)<br />We will distill water to ensure there are no impurities<br />Test at which temperatures are the ideal for super cooling water<br />Then record out observations<br />
  4. 4. What is super cooling?<br />Super cooling is when you cool water below its normal freezing point without it becoming a solid.<br />For super cooling to take place there must be no impurities in the water for ice crystals to form on.<br />For this reason we must use distilled water.<br />
  5. 5. How to Super cool water<br />In order to super cool you must have distilled water so ice crystals can not form on any impurities in the water<br />You must let the water and the container be very still in a very cold place(under 0°C) for a long time (at least 2hours)<br />When you shake the water it will freeze and form ice crystals very quickly<br />You’ve then super cooled water!<br />
  6. 6. The Water <br />
  7. 7. Distilled water<br />Distilled water- “water that has been freed of dissolved or suspended solids and from organisms by distillation “<br />Distilled water is used in many applications today such as chemistry labs, cars, steam engines, household aquariums, breweries, and even airplanes.<br />
  8. 8. Distilling Water<br />Distilled water is made by water evaporating into steam then condensed back into water.<br />To distill water we created an apparatus out of 2 bowls, some plastic wrap, a weight, and a source of heat, in this case, the sun. <br />Distilling water can be a long process if you don’t have a sufficient heating source<br />
  9. 9. Our Water Distilling Aparatus<br />
  10. 10. Experiment Summary<br />We are going to test what the ideal conditions for super cooling water are.<br />We are going to distill water, pour it in bottles and try to super cool it at different temperatures and for different amounts of time <br />We think that the water will super cool at everything lower than 10°F for longer than 210 minutes<br />
  11. 11. Hypothesis<br /> We think that the water will super cool at -10°C and -20°C for 210 and 240 minutes.<br />We believe this because we believe the water will not be cooled long enough or at a cold enough temperature to be super cooled at 0°C and 180 minutes<br />
  12. 12. Procedures<br />Poured water into our distilling apparatuses and let sit to distill until we made 4500ml of distilled water.<br />We cleaned out 9 water bottles of the same shape and material thoroughly. <br />We measured and poured the distilled water into cleaned, plastic water bottles.<br />
  13. 13. Procedures (cont.)<br />We then placed the water bottles in a freezer of different temperatures for different times<br />We did 9 different variable combinations with 3 different temperature and 3 different time variables<br />Time and Temperature were the two independent variables<br />We used 180, 210 and 240 minutes as variables<br />We also used 0°C, -10°C and -20°C as variables<br />
  14. 14. Procedures (cont.)<br />After we had done all nine experiments we recoded our data of which super cooled and which did not.<br />We then used this data to make our charts and make a conclusion<br />
  15. 15. Data<br />After the Experiments we found that only 4 of the 9 test actually super cooled<br />No amount of time at 0°C allowed the water to be super cooled<br />All amounts of time at -10°C super cooled <br />All amounts of time except 240 minutes worked for -20°C<br />
  16. 16. Data (cont.)<br />Time (minutes)<br />Temperature (°C)<br />
  17. 17. Observations<br />As shown by the results the water at 0°C for any amount of time didn’t super cool because it was not cold enough to be super cooled<br />When the water that was cooled at -20°C for 240 minutes, the water was left in the cold for too long and it froze without super cooling<br />The water at -10 °C at any amount of time super cooled very well, as long as the water was not agitated during the cooling time<br />
  18. 18. Observations (cont.) <br />The water that was cooled at -20 °C for 180 and 210 minutes super cooled because they were left in just long enough that they didn’t freeze <br />The results showed all times at -10 °C super coooled as well as at -20 °C for 180 and 210 minutes.<br />
  19. 19. Conclusion<br />Our hypothesis was all correct except one part<br />We thought that the water would super cool only at -20°C and -10°C for 210 and 240 minutes<br />The water however did not super cool when put in the cooler at -20°C for 240 minutes<br />It was too cold and it froze the water <br />However the rest of our hypothesis was correct<br />
  20. 20. Conclusion (cont.)<br />It seems that the water needed to cool for at least 210 and at a temperature of at least -10°C<br />However you couldn’t leave it in for too long at too cold of a temperature because it would freeze and not super cool<br />Our hypothesis was mostly correct and our experiment taught us a lot about super cooling water<br />