An unknown metal of mass|CALORIMETRY AND THERMAL|JEEMAIN2019

JEE MAIN 2019

10-01-2019 S2

Question

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 temperature of 8.4°C. Calculate the specific heat of the unknown metal if water temperature stabilizes at 21.5°C. (Specific heat of brass is 394 J $\left.\mathrm{kg}^{-1} \mathrm{~K}^{-1}\right)$

Select the correct option:

$916 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}$

$1232 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}$

$654 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}$

$458 \mathrm{~J} \mathrm{kq}^{-1} \mathrm{~K}^{-1}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution