Physics · 2019
JEE Main · 10 January 2019, Shift 2 · Q30
An unknown metal of mass 192 g heated to a temperature of 100°C was immersed into a brass calorimeter of mass 128 g containing 240 g of water at a…
An unknown metal of mass $\displaystyle 192$ g heated to a temperature of $\displaystyle 100$°C was immersed into a brass calorimeter of mass $\displaystyle 128$ g containing $\displaystyle 240$ g of water at a temperature of $\displaystyle 8.4$°C. Calculate the specific heat of the unknown metal if water temperature stabilizes at $\displaystyle 21.5$°C. (Specific heat of brass is $\displaystyle 394 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}$ )
Official answer
(1)
$\displaystyle 916 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.