# Procedure   Part 1 – Cooling a Metal Cube in Water In this part of…

### Procedure   Part 1 – Cooling a Metal Cube in Water In this part of…

Question

Procedure
Part 1 – Cooling a Metal Cube in Water
In this part of the lab, we measured the differences in final temperature of a series of known metal cubes.
that are cooled in water.
1. Construct the following table.

Part 2 – Specific Heat Capacity of an Unknown Metal
In part 2 you we identified an unknown metal solid by measuring the specific heat capacity indirectly in a
calorimetry experiment.
1. Construct the following table.

Part 3 -Specific Heat Capacity of 1.0M NaCl
In this part of the lab, we measured the specific heat capacity of 1.0M NaCl solution.
1. Construct the following table.

Specific Heat Capacity – Worksheet

1. Define specific heat capacity. Consider the units of the variable when.

2. Calculate the delta T of the room temperature water for each metal cube trial in part 1. If all the
volumes of the metal cubes are essentially the same, what variable(s) account for the different
changes in temperature of the water? Explain and discuss using your experimental data.

3. Consider the specific heat capacities of the metals used in part 1 tabled below. For which
metal is the most heat (in J) stored per gram of material? Explain.

4. Calculate the final temperature of the water, Tf, expected if a 75.0 g copper metal cube at
95.0 °C is added to 50.00 g of water at 20.0 °C.

5. Calculate the specific heat of the unknown metal in part 2 (use Eqn 5 from the procedure).
Determine an average value for the three trials.

6. Identify the unknown metal based on the specific heat.
Metal Literature cmetal (J/g°C)

7. Calculate a % error in your average specific heat.

8. Suggest two sources of error from your measurement in part 2 and how that would impact

9. Calculate the specific heat capacity of your prepared 1.0 M HCl solution. Determine an
average value for the three trials.

10. Based on your data, is it reasonable to assume the specific heat capacity of a 1.0M salt
solution is the same as pure water?

References

• 9.2 Calorimetry – Chemistry: Atoms First 2e | OpenStax, accessed Oct. 2022.
• https://openstax.org/books/chemistry-atoms-first-2e/pages/9-2-calorimetry

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