-Abby, Amara, Faye
What we changed
For our experiment we tried to prevent heat loss by focusing on a different heat transfer every time. On our original calorimeter we focused on all three heat transfers. We then made changes each time according to the heat transfer we were focusing on. These changes are described below.
conduction change of temperature is 49 degrees
convection change in temperature 29 degrees
conduction convection and radiation (original) change in temperature 46 degrees
therefore the energy transfer that looses the most energy is convection. The energy transfer that saved the most energy is conduction.
The significance of our findings
we found that our conduction calorimeter had the largest temperature change. the significance of this is that we discovered that conduction was the easiest heat transfer to stop heat loss. by simply adding different layers of insulation we were able to stop a good chunk of heat loss. Another thing we discovered was that it was more effective to focus on stopping one heat transfer than all three at once. our original calorimeter didn't have the highest change in temperature.
Materials we used
In our original calorimeter we used our knowledge of all three energy transfers (conduction, convection and radiation). we added different materials to try and stop all three energy transfers from happening. we used insulation for conduction, a tight seal for convection and tin foil for radiation.
For our conduction calorimeter we focused on insulation. we added three layers of insulation, starting with insulation on the bottom than layering cut up Styrofoam, a big piece of Styrofoam and towels on top of that.
For our radiation calorimeter we lined everything with tin foil. We did this so that the heat rays would reflected off of shiny side of the tin foil and not escape.
For our convection calorimeter we just cut a big hole in the top of our box. We thought that this would increase the circulation of the air which would increase the heat. We ended up just loosing all of the heat out of the top of the calorimeter.
for our convection calorimeter we just cut a big hole in the top of our box. This wasn't the smartest move, due to the fact that hot air rises and we were loosing all of our hot air out of the hole in the top of the box. In the future a change that our group would make is focusing on the tight seal aspect of convection rather that the circulation of air. In our first experiment we didn't stop the heat loss we encouraged it. Another change that our group would like to make in the future is to attempt at creating a vacuum seal for our radiation calorimeter.