(Solved): coffe cup In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequen ...

In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction. Since the cup itself can absorb energy, a separate experiment is needed to determine the heat capacity of the calorimeter. This is known as calibrating the calorimeter and the value determined is called the calorimeter constant. One way to do this is to use a common metal of known heat capacity, In the laboratory a student heats \( 91.38 \) grams of lead to \( 99.44^{\circ} \mathrm{C} \) and then drops it into a cup containing \( 79.09 \) grams of water at \( 20.61^{\circ} \mathrm{C} \). She measures the final temperature to be \( 23.91^{\circ} \mathrm{C} \). Using the accepted value for the specific heat of lead (See the References tool), calculate the calorimeter constant. Calorimeter Constant \( =1 \quad 3 /{ }^{\circ} \mathrm{C} \)