Chemistry | Lab Report | Heating and Cooling Curve Lab Report Heating and Cooling Curve It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (i.e., U1_ HeatingandCoolingCurve_Alice_Jones.doc). Introduction 1. What was the purpose of the experiment? To conduct an investigation to determine energy changes that take place as a solid heat up. 2. Write down the variables. (control, independent, dependent) Control Variable - Position and intensity of the Bunsen burner, and the mass of the ice. Independent Variable - Time Dependent Variable - Temperature and physical state (solid, liquid, or gas) 3. Safety measures Wear safety goggles and a lab coat, don't come into close contact with the heat source, and be careful not to overheat it (have control over the heat source). Experimental Methods 1. What tools did you use to collect your data? Crushed ice, beaker, thermometer, tripod, gauze mat, one-holed cork, clamp, Bunsen burner, retort stand, and stopwatch. 2. Describe the procedure that you followed to conduct your experiment. Add crushed ice to a beaker and secure a thermometer in the beaker of ice (so that the thermometer’s bottom is surrounded by the ice). Place a gauze mat on a tripod, and place the beaker on the mat. Place the thermometer into the cork, secure the cork in the clamp, and attach the clamp to the stand at a height where the thermometer’s bottom is a few centimeters above the bottom of the beaker. Check the temperature and phase of the water at 0 minutes (before starting the flame). Set the Bunsen burner flame and set it underneath the tripod. Page 1 of 5 Chemistry | Lab Report | Heating and Cooling Curve Start the stopwatch at the same time. Measure the temperature at every one-minute mark (as seen on the stopwatch), and also record the phase of the water. 3. Experiment Set-Up Diagram: Page 2 of 5 Chemistry | Lab Report | Heating and Cooling Curve Data and Observations 1. Record your observations. Table: Time (min) Temperature (degree Celsius) Phase of water 0 min 0 degrees Celsius Solid 1 min 0 degrees Celsius Solid/liquid 2 min 0 degrees Celsius Solid/liquid 3 min 1.5 degrees Celsius Solid/liquid 4 min 2.5 degrees Celsius Solid/liquid 5 min 5 degrees Celsius Solid/liquid 6 min 7 degrees Celsius Solid/liquid 7 min 10 degrees Celsius Solid/Liquid 8 min 14 degrees Celsius Solid/Liquid 9 min 18 degrees Celsius Liquid 10 min 24 degrees Celsius Liquid 11 min 31 degrees Celsius Liquid 12 min 37 degrees Celsius Liquid 13 min 42 degrees Celsius Liquid 14 min 47 degrees Celsius Liquid 15 min 50 degrees Celsius Liquid 16 min 54 degrees Celsius Liquid 17 min 57 degrees Celsius Liquid Page 3 of 5 Chemistry | Lab Report | Heating and Cooling Curve 18 min 63.5 degrees Celsius Liquid 19 min 69 degrees Celsius Liquid 20 min 79 degrees Celsius Liquid 21 min 83 degrees Celsius Liquid 22 min 86.5 degrees Celsius Liquid 23 min 89 degrees Celsius Liquid 24 min 91 degrees Celsius Liquid 25 min 93 degrees Celsius Liquid 26 min 94 degrees Celsius Liquid 27 min 94.5 degrees Celsius Liquid 28 min 95 degrees Celsius Liquid 29 min 96 degrees Celsius Liquid 30 min 97.5 degrees Celsius Liquid 31 min 95 degrees Celsius Liquid 32 min 96 degrees Celsius Liquid 33 min 96 degrees Celsius Liquid 34 min 96 degrees Celsius Liquid 35 min 97 degrees Celsius Liquid Page 4 of 5 Chemistry | Lab Report | Heating and Cooling Curve 2. Graph 3. Interpretation of the Graph ● ● The experiment interprets how the temperature changes as ice is heated up. The graph shows the acceleration in the temperature against the time associated with. Page 5 of 5
