Lab #8 - Heat Capacity of Metals Sylwester Czado Chemistry...

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Heat Capacity of Metals Sylwester Czado Chemistry 191 Lab Report, Experiment #14 Lab Partners: Ellen Richer, Michael Folcarelli Instructor: Brian Corbett 10-27-05
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Introduction The purpose of doing this particular experiment was to gain an understanding of the terms heat, energy, work, and heat capacity. We will understand how heat is related to molecular motion. The purpose of doing this particular experiment is to use a Styrofoam- cup calorimeter to measure heat capacity of a metal. Then we will be able to confirm the law of Dulong and Petit. Procedure Special Supplies: Hot plate, large iron ring or safety clamp and ring stand, 1000-mL beaker, two 0-100 °C thermometers ( or a 0-50 °C thermometer graduated in tenths of a degree in place of 1 of the 0-100 °C thermometers) , fine copper wire to suspend the thermometer, two 12- to 16-oz Styrofoam cups per student, 25 x 200 mm test tubes ( two to contain water and one for each unknown-metal heat capacity determination) , corks or rubber stoppers to fit test tubes, beaker tongs or pliers with padded jaws, 100-mL graduated cylinder. Chemicals: Metals (in the form of shot or pellets so that they will pour easily from a test tube); for example, aluminum, magnesium, nickel, zinc, antimony, and lead. Safety Precautions: Boiling water can cause painful and serious burns. Use a large iron ring of clamp to a ring stand. Keep the hot plate and ring stand well back from the edge of the laboratory bench. Use beaker tongs or pliers with padded jaws to handle a 25 x 200 mm test tube containing 80 g of metal. 1. Determination of the Calorimeter Constant:
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Put about 700 mL of water in a 1000-mL beaker. The clamp it securely in place on the hot plate and begin heating it to boiling. Put 30-mL of water in each of two 25 x 200 mm test tubes and place them in the beaker. Then they can be heated to the temperature of boiling water. To save time, prepare the weighed and stoppered metals containing the unknown metals. Then put them in the beaker of boiling water.
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Lab #8 - Heat Capacity of Metals Sylwester Czado Chemistry...

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