NEET Physics Temperature & Heat MCQ Question
A copper calorimeter of mass 0.14 kg contains 0.25 kg of water, both initially at 20°C. An aluminium sphere of mass 0.047 kg at 77°C is placed in the calorimeter. Given the specific heat capacities: water = 4.18 × 10^3 J/kg·K, copper = 0.386 × 10^3 J/kg·K, and aluminium = 0.900 × 10^3 J/kg·K, what is the final equilibrium temperature of the system?
22.0°C
23.0°C
24.0°C
25.0°C
Correct Answer
Detailed Explanation
Using the principle of heat exchange, the heat lost by aluminium equals the heat gained by water and the calorimeter. The calculations show the final temperature is 23°C.
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