This unit focuses on the three laws of thermodynamics. Students also explore endothermic and exothermic reactions and total bond energy.
The first segment in this unit looks at the laws of thermodynamics. The students examine heat-related phenomena of chemical thermodynamics using hot and cold packets, illustrating how thermodynamics work in the real world.
The students formulate hypotheses for the chemical process that makes the hot and cold packets from segment A. Our host explains the difference between exothermic and endothermic reactions, and our students explore the concept of specific heat capacity by predicting whether ice cubes will melt faster when placed on metal or plastic.
In segment C, students learn about thermal conductivity and specific heat capacity and see if their predictions for how fast the ice cubes melt were correct. Our host explains how heat capacity affects the earth's climate, and the students begin an experiment using samples of greenhouse gases.
The teacher and students discuss the data gathered from the greenhouse gases experiment from segment C. An expert from Georgia Power explains how the company uses a device called a calorimeter to measure energy obtained from coal. The students set up their own calorimetry experiments using polystyrene cups to make a "coffee cup calorimeter.”
The students perform the coffee cup calorimetry experiment, gathering data to determine what compounds work best to create hot and cold packs.
In segment F, the students complete the design and engineering task of making hot and cold packs. They draw conclusions about what compounds they can use to create the packs based on their observations and the data they compiled.
In this unit, students learn about kinetics, which is the study of factors that affect the rate of chemical reactions. Students also investigate collision theory and the five components of kinetic molecular theory in gas.
Your STEM students haven't been on a field trip in ages and they've had enough! They're taking extreme measures "to compare and contrast the characteristics, composition, and location of comets, asteroids, and meteoroids" by planning an interstellar field trip. Their rocket is almost ready, but they haven't started planning their spacesuits and you're a little worried that they don't fully understand the dangers of space travel. Join GPB Education and an intrepid potato for a STEMonstration about how meteoroids don't play nicely in space and what you can do to save the taternaut!