Lesson 6: Calorimetry Lab Preview CT-STEM

Enthalpy Calculations

Referenced Questions

These questions were answered in the previous steps. They are provided here for your reference.

Question 4.2

Calculate averages for mass of calcium, mass of solution, and change in temperature below.

Question 5.2

Calculate averages for mass of calcium, mass of solution, and change in temperature below.

Question 6.2

Calculate averages for mass of calcium, mass of solution, and change in temperature below.

Questions

Please answer the questions below.

Question 7.1

Fill in the data table below as you complete your experiment.

As the solution is composed primarily of water, the specific heat of the solution will simply be the specific heat of water:

*C_s _solution = specific heat of water = 4.18 J/g•°C

Question 7.2

Classify the reaction as endothermic or exothermic using your enthalpy as evidence.

Question 7.3

Describe how thermal energy was transferred between the system and the surroundings. Include the terms "potential energy" and "kinetic energy" in your answer.

Question 7.4

Compare your calculated enthalpies for your three experiments. What kind of relationship exists between the amount of calcium utilized and the enthalpy?

Question 7.5

Compare your calculated enthalpies of reaction for your three experiments. What do you notice about these values?

Notes

These notes will appear on every page in this lesson so feel free to put anything here you'd like to keep track of.