Chemical Reactions Temperature Investigation

We did the room temperature experiment first. We measured out 266mL of water. We then put in the temperature probe into the water. The temperature started at 23.1 degrees C. We ran a test for a minute and the temperature stayed the same. After we dropped the tablet in we timed it until the reaction had stopped. The temperature dropped from 23.1 to 22.7 degrees C. The next test we did was the hot plate one. We took 266mL of water into a beaker. We then put the beaker of water on the hot plate and we timed and took the temperature. We had to wait until it got to 50 degrees C. It took about 3 minutes to get to that temperature. We then took it off the hot plate and dropped the alka seltzer tablet in it and recorded the data. It took about 28 seconds for the reaction to stop. The temperature dropped about 2 degrees C. The third test we did was the cold test. We measured out 133mL of water and put 2-3 ice cubes in it. We then put in the temperature probe and stirred the water for 1 minute. The temperature started at 0.6 degrees C and ended at 0.3 degrees C.