Tuesday, March 15, 2011

Chemical Reactions and Heat Investigation

My hypothesis was correct. I had predicted that the heat would go the fastest, the room temperature went at a moderate rate, and the cold went had the slowest. The water molecules move faster at a higher temperatures, so they will bump the solute more often. When the water molecules hit, their polar ends attract to the solute's charged ends and they are pulled apart until completely diffused. There also is more space in between the molecules, so the solute can settle in there. Because there is more space, there is more room for the solute to expand and than dissolve. This is the opposite for cold, because the molecules move slower, so it does not dissolve as fast. The major difference between all three test trials, was manifestly the time it took to dissolve. The room temperature test took about 40 seconds to completely dissolve. The hot water test nearly cut this in half, so it was an outstanding 25 seconds. Finally, the cold water test took 1 minute and 55 seconds. Some of the similarities that I noticed between all three of the tests is that it reminded me of carbonated water/soda, because of the bubbles. Also the liquid became very cloudy, right after the tablet was dropped into the water. In every lab/experiment, there always is something that will skew the results. One of the things in our specific experiment would have to do with the temperature probe. In the time during the different sessions, the temperature probe did not have enough time to convert back to room temperature. We tried to weight it out as much as possible, but still was a few degrees off. In the end, this experiment was cool to see the reaction in different temperatures.

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