calorimetry help!!! please show all steps so I can learn how to do it!!! menttak

Question

calorimetry help!!! please show all steps so I can learn how to do it!!! menttakeCovalentActivity do?locator assignment-take&takeAssignmentSessionL; ocator assignment take In the laboratory a "coffee eup" calorimeter, or constant pressure calorimeles, is frequently used to determine the specific heat of a solid, or to measure the energy of a sohation phase reaction Since the cup itself can absotb energy, a separate experiment is needed to determine the heat capacity of the calorimeter. This is known as calbrating the calorimeter and the value determined is called the One way to do this is to use a common metal of known heat capacity. In the laboratory a student heabs 90.34 grams of lead to 9s.59 "C and then drops it into a cup containing 78.07 grams of water at 22.96 C She measures the final temperature to be 26.13 °C Using the accepted value for the specific heat of lead (Sce the References tooD, calculate the calorimeter constant Calorimeter Constant JPC Submit Answer Retry Entire Group 8 more group attempts remaining Prevous

Explanation / Answer

Heat lost by metal = ( 90.34 * 0.128 * (26.13 - 98.59))

q = -837.893 J

Heat absorbed by water = ( 78.07 * 4.187 * (26.13-22.96))

q = 1036.21 J

Heat difference = 1036.21 - ( -837.893)

q = 1874.103 J

calorimeter constant = q / dT = 1874.103 / 72.46

calorimeter constant = 25.864 J / degree C

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