thermodynamics.gif (19136 bytes)


CALORIMETER








EQUIPMENT

    redball.gif (326 bytes) Lead Shot
   
redball.gif (326 bytes) 400 ml Pyrex (NOT KIMAX) Beaker
   
redball.gif (326 bytes) 400 ml Pyrex (NOT KIMAX) Beaker with Wooden Handle
    redball.gif (326 bytes) 1000 ml Pyrex (NOT KIMAX) Beaker
   
redball.gif (326 bytes) Thermometers
    redball.gif (326 bytes) Hot Plate
    redball.gif (326 bytes) Variac



NARRATIVE
            A calorimetry experiment may be performed to determine the specific heat of lead using lead shot. Measure into one 400 ml beaker, 100 g of water and in another 400 ml beaker, 300 g of lead shot. DO this early enough so that the water reaches room temperature. Fill the 1000 ml beaker about 3/4 full of water. Place the wooden handle around the 400 ml beaker containing the lead shot and place it in the 1000 ml beaker. Bring the water to a boil using the hot plate and allow the lead shot to come to equilibrium. Measure and record the equilibrium temperature. Pour the lead shot into the 400 ml beaker containing the 100 g of room temperature water. Record the equilibrium temperature. Using the equation:

DQgained = DQlost, where DQ = mcDT

Calculate the specific heat of lead, where:

                                Specific Heat of Water = 4.18 kJ/(kg-K)
                                Specific Heat of Lead Shot = 0.128 kJ/(kg-K)