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An unknown metal of mass \( 192 \mathrm{~g} \) heated to a temperature of \( 100^{\circ} \mathrm{C} \) was immersed into a brass
P
calorimeter of mass \( 128 \mathrm{~g} \) containing \( 240 \mathrm{~g} \) of water at a temperature of \( 8.4^{\circ} \mathrm{C} \). Calculate the specific heat of the unknown metal if water temperature stablizes at \( 21.5^{\circ} \mathrm{C} \). (Specific heat of brass is \( 394 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \) )
(1) \( 458 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)
(2) \( 1232 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)
(3) \( 916 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)
(4) \( 654 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1} \)


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