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 12.87 g of BaCl;(s) are dissolved in 101.30 g of water, the temperature of the solution increases from 24.77 to 27.07 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.87 J^C. Based on the student's observation, calculate the enthalpy of dissolution of BaCly(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. AHolution kl/mol

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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.39QP: You have two samples of different metals, metal A and metal B, each having the same mass. You heat...
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Thermometer
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.
Cardboard or
Styrofoam lid
In the laboratory a general chemistry student finds that when 12.87 g of BaClz(s) are dissolved in 101.30 g of
water, the temperature of the solution increases from 24.77 to 27.07 °C.
The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a
separate experiment to be 1.87 J/C.
Nested
Styrofoam cups
Based on the student's observation, calculate the enthalpy of dissolution of BaClą(s) in kJ/mol.
Reaction
Assume the specific heat of the solution is equal to the specific heat of water.
occurs in
solution.
AHdissolution
kJ/mol
Transcribed Image Text:Thermometer 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. Cardboard or Styrofoam lid In the laboratory a general chemistry student finds that when 12.87 g of BaClz(s) are dissolved in 101.30 g of water, the temperature of the solution increases from 24.77 to 27.07 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.87 J/C. Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of BaClą(s) in kJ/mol. Reaction Assume the specific heat of the solution is equal to the specific heat of water. occurs in solution. AHdissolution kJ/mol
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