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Transcript
Specific Heat Capacity Lab Purpose: To determine the identity of an unknown metal by determining its specific heat capacity, “c” Materials: unknown metal sample, calorimeter, styrofoam cup, water, beaker, hot plate, string, thermometer, balance Background: If substances of different temperatures are in contact with each other, heat flows until they reach the same temperature. The heat lost by one substance will be gained by another substance For a styrofoam cup filled with water and then placed in a calorimeter, heat lost by a hot sample placed inside will be gained by the water. Heat lost by sample = heat gained by water - mcT = + mcT where “m” is the mass in kilograms, “c” is the specific heat capacity, and T is the temperature change. Procedure: Take appropriate measurements to find the heat gained by the water, + mcT: Data Heat gained by water, Q = ____________ To find the specific heat capacity of the unknown sample “c”, the equation Q = mcT is rearranged to solve for “c”. Write the equation for “c” in letters only, and then show the numerical values for Q, m, and T (For the metal!!), then your calculated value for “c”: c= = = _______________ From a table of “specific heat capacities” the unknown sample is identified as______________. Sample 2: Take appropriate measurements to find the heat gained by the water, + mcT: Data Heat gained by water, Q = ____________ To find the specific heat capacity of the unknown sample “c”, the equation Q = mcT is rearranged to solve for “c”. Write the equation for “c” in letters only, and then show the numerical values for Q, m, and T (For the metal!!), then your calculated value for “c”: c= = = _______________ From a table of “specific heat capacities” the unknown sample is identified as______________. Sample Three: Take appropriate measurements to find the heat gained by the water, + mcT: Data Heat gained by water, Q = ____________ To find the specific heat capacity of the unknown sample “c”, the equation Q = mcT is rearranged to solve for “c”. Write the equation for “c” in letters only, and then show the numerical values for Q, m, and T (For the metal!!), then your calculated value for “c”: c= = = _______________ From a table of “specific heat capacities” the unknown sample is identified as______________.