`CalorimetryAlbert Oldenburg               Lindblom Tech. H.S.                               6130 So. Wolcott                               Chicago, Il. 60636                               312-535-9300Objective:     To develop an understanding of the fundamentals of calorimetry.  That the students will learn how to manipulate and set up the equipment and the development of increasing and decreasing amounts of heat.Materials:    Three gallon plastic pail, 12 oz. plastic or styrofoam cups, calorimeters with aluminum inside cups, metal dial thermometers, triple beam or double pan balances, set of masses, about three gallons of water, hot plates, ice cubes, and a pencil and paper.Strategy:This lesson is usually used as the first in the series of heat experiments.  A brief demonstration comparing a large amount of heated water versus a small amount at the same temperature shows the large difference in calories.  This should show how to capture heat with water.  The 'hook' for the lesson was "If aperson were weight conscious, would it be better to drink ice tea or hot tea?"  From here the instructor has the class weigh the styrofoam cup, about 200 grams of water and two ice cubes.  They would stir them with a metal dial thermometer until the cubes are melted, taking note and recording the temperature.  The groups would then calculate the calories from the mass and temperature difference.  A small discussion follows to see that everybody is following.  Thenext part is to determine the calories in a cup of hot water.  The styrofoam cupneed not be weighed but the room temperature water and the hot water are.  The mixture is stirred and the highest temperature is recorded.  From this the calories are determined for the 'hot tea'.  A discussion of the calories from the hot tea compared to the iced tea concludes that it would be better to drink the iced tea if a person were calorie conscious.  This should help students tobetter understand how to scientifically determine a calorie and how to set up anexperiment to do it. `