Physical changes that involve liquids and aqueous solutions can be studied using a polystyrene calorimeter like the one shown in Figure 1. Such materials can be applied to practical thermochemical systems. For example, when athletes are injured, they may immediately hold an ‘instant cold pack’ against the injury; and over time, the athlete may apply ‘instant hot pack’ to help recover. The medical hot/cold pack operates on the principle that certain salts dissolve endothermically in water, while others dissolve exothermically. The amount of heat per unit mass involved in the dissolving of a compound is a characteristic property of that substance. It is called the enthalpy of solution. The purpose of this experiment is to use calorimetry to determine the enthalpy of solution of an unknown salt, and then to use that value to identify the salt in a medical hot/cold pack, from a list of possible candidates.
In this project, students will apply their understanding of the structures unit to create a piece of cardboard furniture that is designed to suit the needs of a member of your school community. read more
Inquiry Focus: How can we plan and build a structure for Our Town that has the base area of 100 units square and incorporates one or more electrical components? Other... read more
Students will dive into the SBI 4U course using the scenario of Maria's Travels as a way for students to make self generated connections to curriculum ideas through inquiry using the 3-Pocket method.... read more