8. Thermochemistry
Constant-Pressure Calorimetry
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ANSWERS OPTIONS
A
-108.77 kJ/mol
B
-98.83 kJ/mol
C
-30.59 kJ/mol
D
75.22 kJ/mol
The heat of dissolution is the heat evolved or absorbed when a solid dissolves in water, and can be determined using a coffee cup calorimeter.
A student finds that when 5.00 g of CuSO4(s) is dissolved in 120 g of water, the temperature of the solution increases from 23 to 28.9 °C. In a separate experiment, the heat capacity of the calorimeter was determined to be 1.65 J/°C. Calculate the heat of dissolution of CuSO4(s) in kJ/mol based on these findings. Assume the specific heat of the solution is equal to the specific heat of water.