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. Thermometer Cardboard or In the laboratory a general chemistry student finds that when 0.46 g of MgCl2(s) are Styrofoam lid dissolved in 102.20 g of water, the temperature of the solution increases from 24.17 to 26.04 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.67 J/°C. Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of MgCl2(s) in kJ/mol. Reaction occurs in Assume the specific heat of the solution is equal to the specific heat of water. solution. AHdissolution kJ/mol CoCan

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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.
Thermometer
Cardboard or
In the laboratory a general chemistry student finds that when 0.46 g of MgCl,(s) are
Styrofoam lid
dissolved in 102.20 g of water, the temperature of the solution increases from 24.17 to
26.04 °C.
The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant)
was determined in a separate experiment to be 1.67 J/°C.
Nested
Styrofoam cups
Based on the student's observation, calculate the enthalpy of dissolution of MgCl2(s) in
kJ/mol.
Reaction
occurs in
Assume the specific heat of the solution is equal to the specific heat of water.
solution.
AHdissolution
kJ/mol
chookc Cngage Lng
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. Thermometer Cardboard or In the laboratory a general chemistry student finds that when 0.46 g of MgCl,(s) are Styrofoam lid dissolved in 102.20 g of water, the temperature of the solution increases from 24.17 to 26.04 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.67 J/°C. Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of MgCl2(s) in kJ/mol. Reaction occurs in Assume the specific heat of the solution is equal to the specific heat of water. solution. AHdissolution kJ/mol chookc Cngage Lng
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