3. A 71.4 g piece of gold at 650.0K is dropped into 180.0 g of H20(l) at 310.0K in an insulated container at 1 bar pressure. Calculate the temperature of the system once equilibrium has been reached. Assume that Cp,m for Au(s) and H2O(l) is constant at their values for 298 K throughout the temperature range of interest. Com (Au, solid) = 25.4) moll!, Cem (H2O, liquid) = 75.3J molk, Molar mass of Au = 196.97 g/mol, and Molar mass of H2O = 18.015 g/mol