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When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution...

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 8.77 g of CsBr(s) are dissolved in 115.80 g of water, the temperature of the solution drops from 22.62 to 20.13 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.62 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of CsBr(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. ΔHdissolution =____ kJ/mol

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Expert Solution

Hdissolution = 31.6 kJ/mol

queen_honey_blossom answered 2 years ago
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