question_answer

In an experiment a sphere of aluminium of mass 0.20 kg is heated upto 150°C. Immediately, it is put into water of volume 150 cc at 27°C kept in a calorimeter of water equivalent to 0.025 kg. Final temperature of the system is 40°C. The specific heat of aluminium is - (take 4.2 Joule = 1 calorie)                                                      [JEE Online 08-04-2017]

A) \[434J/k{{g}^{-o}}C\]

B)      \[378J/k{{g}^{-o}}C\]

C) \[315J/k{{g}^{-o}}C\]  

D) \[476J/k{{g}^{-o}}C\]

Correct Answer: A

Solution :

[a] Q given = Q used