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Question

A conducting tube is passing through a bath. A liquid at temperature 90C and specific heat s is entering at one end of tube. The rate of flow of liquid is 1kg/s and exit temperature is 50C. In bath another liquid having specific heat 2s and inlet temperature 20C is entering at a rate of 2kg/s. If the exit temperature of liquid coming out of the bath is 10x. Find x (Assume steady-state condition) ___

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Solution

Heat lost by liquid flowing through the tube in 1 second = Heat gained by liquid in bath in 1 second
1×s×(9050)=2×2s×(10x20)

40=4(10x20)

80+40=40x

120=40x

x=3


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