Specific Heat Capacity
In the Specific Heat Capacity lab, the objectives were to understand, calculate, and determine how much energy (joules) is required in order to make an element rise one ºC per Gram (g). The sample elements used were five different metals, Aluminum (Al), lead (Pb), copper (Cu), and two of which that are unknown, expected to be explained by comparing the experimental specific heat capacity (cp) against the accepted cp of a the metal my observations lead to test. The lab consisted of the comparison of the water temperature to the temperature of the metal used in the procedure. To make the comparison you need to mass the amount of water and metal you use in g. and then record the initial temperature (Ti) of both. To make sure that the Ti of the metal is accurately measured a Bunsen Burner was used to boil water in a beaker that contained a test tube with the sample metal. Once both temperatures were recorded the metal was then placed into the water that was incased in a calorimeter (foam Cup). The highest temperature reached in the calorimeter, the final temperature (Tf), is the last needed measurement to complete the lab and calculate the cp of that metal. The formula used to calculate the cp of the metal is the cp
The fifth experiment dealt with a 20.28g sample size of unknown metal, heated to 100.7ºC, then placed in 75.01g of water at 26.5ºC in the calorimeter, which raised the water temperature to 28.5ºC. The cp formula indicated that the second unknown had a cp of .448.Due to my observations evidence suggested iron was the unknown metal due to the closely matched cp of iron, which has a cp of .398.Using the %error formula, the %error reached 11.0%, this %error seems to account for our experiment because there was a small portion of mechanical error in the lab. The unknown was not completely covered within the water at the beginning of the lab. My lab partners and I attempted to add a small amount of water to cover the sample unknown, but some water was added accidentally to the test tube which was then added to the calorimeter when we added the unknown metal. For the unknown metal two, the R^2 values of the class data were 74%.
Some topics in this essay:
Tw4184/MmDelta Tm,
Bunsen Burner,
Aluminum Al,
Heat Capacity,
Ti Tf,
unknown metal,
Ti Ti,
cp metal,
class data,
Xy Scatter,
specific heat,
accepted cp,
cp formula,
sample size,
r^2 value,
heat capacity,
cp value,
specific heat capacity,
error technological error,
difference ti tf,
calculate cp metal,
value class data,
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Approximate Word count = 977
Approximate Pages = 4 (250 words per page double spaced)
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