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Heat Transfer

            In this experiment you will increase the temperature of metal specimens to that of boiling water. Then you'll place each specimen in a double Styrofoam cup that contains room temperature water. The specimen will and cool and the water temperature will rise until both are at the same temperature. Or the heat loss by the metal is equal to that of the heat gain by the water. Specific heat (c) is the quantity of heat (Q) per mass (m) per change in temperature (T). For water for example its specific heat is equal to .
             4.184 J g
             • °C.
             Objective: .
             To heat a metal and find the temp. change in water. Then find the specific heat of the metal by Qmetal = -Qwater.
             Materials:.
             hot plate metal specimens beaker tongs Styrofoam cups (2).
             balance thermometer tape.
             Procedure:.
             1. Measure the mass of each specimen. Then place the specimens in a beaker of water, deep enough to cover the specimens, and heat the beaker to boiling.
             2. While the beaker is being brought to a boil, assemble the pairs of Styrofoam cups with one cup inside the other as you have specimens. The device you are suppose to make with the cups is called a calorimeter. Fill the cup up with water that will cover the object.
             3. Let the water in the beaker boil vigorously for more than a minute until you are convinced the specimens are in thermal equilibrium with the boiling water. Then use tongs quickly remove the specimen from the boiling water, and place it in the calorimeter.
             4. Shake the calorimeter help equilibrium the thermal energy. Then find the final temperature of the water in the calorimeter.
             Conclusion:.
             By doing this lab I learned about specific heats of some metal specimens. Some absorbed a great deal of heat and some absorbed very little heat form the boiling water. The errors in my results could have been caused by using Styrofoam cups calorimeter. My best results came when the temperature was raised more than 7 degrees.


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