Phase Change Lab Written Response
Our objective in our phase change lab was to record observations of the increase in temperature (in Celsius) as water changed from solid to liquid to gas over a hot plate. This lab report will discuss quantitative and qualitative data contained in the lab, how energy is related to phase change in water and an elucidation of how melting point and boiling point relate to the physical properties of matter. This paper will basically outline the lab done in class and a way for the teacher to see what was learned from this lab. A real-life situation to this phase change of water is the glaciers that are changing to water due to global warming.
During class data was collected to figure out the phase change of water from a solid to a liquid to a gas. Both quantative and qualitative data was recorded during the lab. To better outline this information, quantitative observations are observations, which are made through numbers and measurements. Qualitative observations are observations are observations, which are made through physical features, which are vague in comparative terms. The quantitative data that was collected in the lab was the jump in temperature starting out at 2 degrees Celsius and turning into 95 degrees Celsius (Boiling) water over a period of 20 min. The qualitative data that was made from the data was the changes in temperature. Please refer to the line graph containing the temperature change on the 4th page. The data was examined and showed a sudden jump in temperature at certain points in the process. For example, in our graph the starting temperature (2 degrees Celsius) jumped to 8 degrees Celsius within 3 minutes of heating. Also towards the last 5 minutes the temperature stayed constant at 95 degrees Celsius. The change in temperature was due to the energy provided by the hot plate.
A question that could be asked would be where all of this energy comes from in order to change the state of the water...
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