Students will experimentally classify solubility as either endothermic or exothermic buy measuring temperature increases or decreases in a micro scale calorimeter. Using the calorimeter, students will then explore reactions with acids and metals, determine the ÆH for the reaction, and rank those results.

Students will make and explain how a cold pack/hot pack works using safe and available chemicals and with all necessary safety precautions. They will make recommendations of how much of each chemical to use to maximize the temperature change and control the cost of the hot or cold pack.

Students will use the internet to research endothermic and exothermic reactions and examples Of each. They will then develop a verbal and graphic definition for of each.

Students will use a calorimeter to measure the energy given off by various food items (i.e. peanut) and compare to the calories provided on labels.

*Unifying Concept (NSES) represented in this activity. Unifying concepts cross curricular areas and provide students with productive and insightful ways of thinking about and integrating basic ideas that explain the natural and designed world.