This week will be our first official \"at home\" experiment. Create your own exp
ID: 1654412 • Letter: T
Question
This week will be our first official "at home" experiment. Create your own experiment to ate qualitatively and measure quantitatively the heat capacities of a variety of materials. Carry out your experiment. You will post your experimental design, here, by Thursday, to open commentary, by your peers and myself. I encourage you to read through your peers' experiments to find ways to improve on one another's. By Sunday, you will then upload your data and findings in the Assignments link for this week's module Parameters to Include: Trial of at least three materials. Try to think of singular materials like plastic or glass, rather than steel insulated plastic. Create a scale to be able to qualitatively discuss heat capacity. Qualitative data is non-measurable, but is more observable. For example, which material felt hotter to you? What about the substance you used to discern the heat of the material? Did you see any color changes? You should take at least three measurements of the (at least three) materials you evaluated. Create a table and record your temperature (quantitative) measurements.Explanation / Answer
I can tell you procedure to go with for this experiment:
The basic concept is Whenever two objects with different initial temperatures are put in contact with each other, the warmer one will cool down, and the cooler one will warm up, until they reach the same temperature.
Q = mc*(T2 - T1) (T2 = Final tempereture and T1 = initial tempereture and c is specific heat capacity)
Procedure:
1) Materials required are triple-beam balance, metal samples, calorimeter cup, two temperature sensors or thermometers, metal can, and hotplate.
2)Fill half of metal aproximately with water Heat water on hot plate to 60-800 approx. Keep the temperature of the water as steady as possible
3) Measure the mass of the inner aluminum cup only (remove it from the outer cup, and remove the plastic ring) using the triple-beam balance. Note the uncertainty in this mass.
4) Now Measure the mass of the metal sample using the triple-beam balance. Note the uncertainty in this mass.
5) Tie a thread to the metal sample, and lower the sample into the metal can, to allow it to heat up. Thread is tied so that sample can be taken out anytime. Keep measuring water tempereture using thermometer
6) At the sink, fill the inner aluminum cup part-way with cool water. Be careful excess water or too less water can damage reliability of readings. Fill enough water to cover metal sample
7)Measure the mass of the inner aluminum cup , now partially filled with water. Note the uncertainty in this mass. The mass of the water itself will be this new mass, minus the mass you found in step 4.
8) Insert the inner calorimeter cup into the outer calorimeter cup, with the plastic insulating ring separating them. Place the cover over the calorimeter and insert the second thermometer through the stopper in the top cover. The stirrer should also be inside, going through the hole near the middle of the top cover. Gently stir the water for about a minute.
9) Record the initial temperature of the cool water in the calorimeter cup after all temeretures become stable. Record the initial temperature of the metal sample
10) Remove the metal sample from the metal can. Also remove cover from calorimeter.
11) Quickly place the metal sample in the inner calorimeter cup, and confirm that it is indeed fully submerged. Quickly re-cover the calorimeter.
12) above step is done so that no heat escapes outside
13) Gently stir the water until the water and metal specimen reach a final equilibrium temperature.
14) Record the final equilibrium temperature, with its uncertainty.
15) Repeat above steps for different materials
use temeretures recorded and mass values to calculate c (specific heat capacity)
Hope it helps
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.