1. When a solid dissolves in water, heat may be evolved orabsorbed. The heat of dissolution (dissolving) can be determinedusing a coffee cup calorimeter. In the laboratory a generalchemistry student finds that when 11.14 g of CsBr(s) are dissolvedin 119.50 g of water, the temperature of the solution drops from22.60 to 19.51 °C. The heat capacity of the calorimeter (sometimesreferred to as the calorimeter constant) was determined in aseparate experiment to be 1.61 J/°C. Based on the student'sobservation, calculate the enthalpy of dissolution of CsBr(s) inkJ/mol. Assume the specific heat of the solution is equal to thespecific heat of water. ΔHdissolution = kJ/mol
2. When a solid dissolves in water, heat may be evolved orabsorbed. The heat of dissolution (dissolving) can be determinedusing a coffee cup calorimeter. In the laboratory a generalchemistry student finds that when 11.83 g of CsCl(s) are dissolvedin 115.50 g of water, the temperature of the solution drops from22.20 to 19.26 °C. The heat capacity of the calorimeter (sometimesreferred to as the calorimeter constant) was determined in aseparate experiment to be 1.51 J/°C. Based on the student'sobservation, calculate the enthalpy of dissolution of CsCl(s) inkJ/mol. Assume the specific heat of the solution is equal to thespecific heat of water. ΔHdissolution = kJ/mol
