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10.1 g CaO is dropped into a styrofoam coffee cup containing 157 g H2O at 18.0 C.If the following reaction occurs, what temperature will the water reach, assuming that the cup is a perfect insulator and that the cup absorbs only a negligible amount of heat (The specific heat of water = 4.18 J/g· C)
CaO(s) + H2O(l) Ca(OH) 2(s) H rxn = -64.8 kJ/mol
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