please answer both parts and i will upvote; thanks

When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a colfee cup colorimeter. In the laboratory a general chemistry student finds that when 2.44g of NH4ClO4(s) are dissolved in 112.90g of water. the temperature of the solution drops from 22.43 to 20.86C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in o separate experiment to be 1.67J/C. Based on the student's observation, calculate the enthalpy of dissolution of NH4ClO4(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water: Hdistolution=kJ/mol 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 10,57g of BaBr2(s) are dissolved in 108.90g of water, the temperature of the solution increases from 22.03 to 23.76C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate: experiment to be 1.57JC. Based on the student's observation, calculate the enthalpy of dissolution of BaBr2(5) in KJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. Hdissolution= kJ/mol