JEE Main 2013 Physics question
A mass of 50 g of water in a closed vessel, with surroundings at a constant temperature takes 2 minutes to cool from 30°C to 25°C. A mass of 100 g of another liquid in an identical vessel with identical surroundings takes the same time to cool from 30°C to 25°C. The specific heat of the liquid is : (The water equivalent of the vessel is 30 g.)
Answer: (4)
Solution
Equal time for the same temperature drop with identical surroundings means equal total heat capacity. Water case:
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