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  4. Two liquids are at temperature 20°C and 40°C. When same mass of both of them is mixed, the temperature of the mixture is 32° C. What is the ratio of their specific heats ?

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Q. Two liquids are at temperature $20^\circ$C and $40^\circ$C. When same mass of both of them is mixed, the temperature of the mixture is $32^\circ$ C. What is the ratio of their specific heats ?

Thermal Properties of Matter

Solution:

$Mc_1(32 - 20) = Mc_2 (40 - 32)$
. $This\, gives\, c_1 / c_2 = 2 /3.$