A beaker contains 200 g of water. The water equivalent of beaker is 20 gm . The initial temperature of water in the beaker is 2 0 ∘ C . If 440 g of hot water at 9 2 ∘ C is poured in, then the final te

Question

A beaker contains 200 g of water. The water equivalent of beaker is 20 gm . The initial temperature of water in the beaker is 2 0 ∘ C . If 440 g of hot water at 9 2 ∘ C is poured in, then the final temperature, will be nearest to: (neglect heat loss)

TestHub · Accepted Answer

Heat lost by the hot water: Q l os t ​ = 440 ( 92 − T ) Heat gained by water and beaker ( 220 g equivalent): Q g ain e d ​ = 220 ( T − 20 ) 440 ( 92 − T ) = 220 ( T − 20 ) T = 6 8 ∘ C

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