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 10.37 g of BaBr2(s) are dissolved in 101.80 g of water, the temperature of the solution increases from 22.26 to 24.08 °C.
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 10.37 g of BaBr2(s) are dissolved in 101.80 g of water, the temperature of the solution increases from 22.26 to 24.08 °C.
Chapter10: Energy
Section: Chapter Questions
Problem 56A
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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 10.37 g of BaBr2(s) are dissolved in 101.80 g of water, the temperature of the solution increases from 22.26 to 24.08 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.64 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of BaBr2(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. ΔHdissolution = _______ kJ/mol |
Transcribed Image Text:Thermometer
Cardboard or
Styrofoam lid
Nested
Styrofoam cups
Reaction
occurs in
solution.
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