When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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When a solid dissolves in water, heat may be evolved or absorbed.
The heat of dissolution (dissolving) can be determined using a
coffee cup calorimeter.
In the laboratory a general chemistry student finds that when 4.70
g of CSCIO4(s) are dissolved in 113.20 g of water, the
temperature of the solution drops from 25.54 to 22.97 °C.
The heat capacity of the calorimeter (sometimes referred to as the
calorimeter constant) was determined in a separate experiment to
be 1.66 J/°C.
Based on the student's observation, calculate the enthalpy of
dissolution of CSCIO4(s) in kJ/mol.
Assume the specific heat of the solution is equal to the specific
heat of water.
AH dissolution
kJ/mol
BrookCo, Cengage Leaming
Thermometer
Cardboard or
Styrofoam lid
Nested
Styrofoam cups
- Reaction
occurs in
solution.
Transcribed Image Text:When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 4.70 g of CSCIO4(s) are dissolved in 113.20 g of water, the temperature of the solution drops from 25.54 to 22.97 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.66 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of CSCIO4(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AH dissolution kJ/mol BrookCo, Cengage Leaming Thermometer Cardboard or Styrofoam lid Nested Styrofoam cups - Reaction occurs in solution.
When a solid dissolves in water, heat may be evolved or absorbed.
The heat of dissolution (dissolving) can be determined using a
coffee cup calorimeter.
In the laboratory a general chemistry student finds that when 2.09
g of CoCl₂(s) are dissolved in 113.10 g of water, the temperature
of the solution increases from 23.54 to 26.30 °C.
The heat capacity of the calorimeter (sometimes referred to as the
calorimeter constant) was determined in a separate experiment to
be 1.80 J/°C.
Based on the student's observation, calculate the enthalpy of
dissolution of CoCl₂(s) in kJ/mol.
Assume the specific heat of the solution is equal to the specific
heat of water.
AH dissolution
kJ/mol
BrookCo, Cengage Leaming
Thermometer
Cardboard or
Styrofoam lid
Nested
Styrofoam cups
- Reaction
occurs in
solution.
Transcribed Image Text:When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.09 g of CoCl₂(s) are dissolved in 113.10 g of water, the temperature of the solution increases from 23.54 to 26.30 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.80 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of CoCl₂(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AH dissolution kJ/mol BrookCo, Cengage Leaming Thermometer Cardboard or Styrofoam lid Nested Styrofoam cups - Reaction occurs in solution.
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