B. Heat of Solution Mass of calorimeter + water Mass of solid + plastic packet Mass of plastic packet Mass of water, m water Mass of solid compound Initial temperature of calorimeter Final temperature of calorimeter 9rxn ΔΗ soln 226,912 8 5.907 g .746 g 48.665 5.161 g 22.4 18.0 °C °C J 896 J g/mol J/mol Molar mass of solid compound AH soln per mole of solid The dissolution reaction is Unknown solid number endothermic (exothermic or endothermic) 1135 (84.99 g/mol)

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