A 62.5-g piece of gold at 650. K is dropped into 165 g of H2O (l) at 298 K 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 and H2O are constant at their values for 298 K throughout the temperature range of interest.
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and 
. Last expression is simplified by substituting known variables:
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A 62.5-g piece of gold at 650. K is dropped into 165 g of H2O (l) at 298 K in an insulated container...
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