Specific heat of a metal

 

background [prelab assignment (24 points); due at the beginning of the lab]

1. which metal, copper or aluminum, at the same mass and temperature would have the largest increase in the temperature of water upon the addition of the metal to a container of water ?  support your answer using mathematics; e.g. sketch its graph

2. design an experiment to confirm your answer

3. sketch a data table for your experimental measurements.

4. calculate the number of grams of water, where the addition of 50.0 g of copper at 100. °C would change the temperature of water by 5.0 °C; assume that the initial temperature of the water is 20.0 °C?

5. simulate: adding 50 g of Sn at 100 °C to 60 g water at 20 °C and confirm / refute the results (i.e. "final temperature") based on "theory"

6. simulate: adding 100 g of water at 20 °C to 200 g water at 60 °C and confirm / refute the results (i..e. "final temperature") based on "theory"

purpose

experimentally determine the specific heat of a metal

compare the experimental final temperature of mixing 2 liquids at a different temperatures to its theoretically calculated final temperature

fulfill various aspects of the NGSS science & engineering standards.

materials

solid metal cylinder

~ 50 mL water; pair of styroform cups; beaker; temperature probe; balance; graduated cylinder

hot plate

methods / data analysis

student design

 

Content of lab report  [35 points]

results  [20 points]

data table

calculate the specific heat of metal based on your experimental data

calculate the thereotical "final" temperature of mixing 2 liquids at different temperatures

statistics to compare theory versus experimental "final" temperature of mixing 2 liquids at different temperatures

discussion  [15 points]

describe the relationship between the final temperature (in a system with a hot metal added to water at room temperature) as a function of the specific heat of a metal; justify / rationalize your response using mathematics.

basis / rationale of difference between thereotical versus calculated "final" temperature of mixing 2 liquids at different temperatures. if there's no difference, then it's "free" points upon stating that there's no difference.

describe / list two NGSS science & engineering practices that correlates to an aspect of this laboratory activity; provide an example in the lab & this lab report that meets these practices