An unknown metal of mass 192 g heated to a temperature of 100ºC was immersed into a brass calorimeter of mass 128 g containing 240 g of water at a temperature of 8.4 ºC. Calculate the specific heat of the unknown metal if water temperature stabilizes at 21.5 ºC. (Specific heat of brass is 394 J kg–1 K–1)
(1) 916 J kg–1 K–1
(2) 654 J kg–1 K–1
(3) 458 J kg–1 K–1
(4) 1232 J kg–1 K–1