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Lab 8: Temperature During Melting
Refer to the Beyond Labz application to find the lab bench and the Beyond Labz landing. Follow the instructions on the Beyond Labz worksheet specific to the lab title in order to complete this assignment.
Download the Beyond Labz worksheet for this lab here:
Temperature During Melting.pdf
Purpose
To determine how temperature changes as ice is heated and becomes liquid water
Intuition
Have you ever sat and watched the ice melt in your cup in the summer? Or watched as you melted butter or chocolate while baking? Phase changes are not actually that interesting to watch, are they? Nothing seems to happen for a long time as you see both phases simultaneously together. Then when all of the solid material has finally melted, the liquid can finally heat up!
Definitions
Melting Point, Calorimeter
Context & Theory
Depending on the temperature, most substances can exist as both a solid and a liquid. A substance in its liquid state has more thermal energy than it has in its solid state. The temperature at which a substance changes from a solid to a liquid is the melting point of the substance. The melting point is a characteristic property of a substance. Chemists often use the melting point to help identify or classify a substance.
Second lab
Lab 9: Molecular Motion & Thermal Energy
Refer to the Beyond Labz application to find the lab bench and the Beyond Labz landing. Follow the instructions on the Beyond Labz worksheet specific to the lab title in order to complete this assignment.
Download the Beyond Labz worksheet for this lab here:
Molecular Motion and Thermal Energy.pdf
Purpose
To calculate the amount of kinetic energy in a system and observe what happens when the system is given more energy.
Intuition
What do you feel when you touch a hot frying pan? What do you feel when you sit down on your car seat when your car has been sitting in the sun? What do you feel when you pick up a plastic cup full of hot water? These are examples of how you notice thermal energy.
Definitions
Kinetic Energy; Thermal Energy
Context & Theory
All matter contains atoms, which move randomly throughout the substance. These atoms have kinetic energy. Some objects are rigid solids, so the atoms aren’t as free to move around, but the atoms still have the potential to move and, in fact, are moving slightly. The total potential and kinetic energy of an object make up its thermal energy
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