The temperature of equal masses of three different liquids A, B and C are 12ºC, 19ºC and 28ºC respectively. The temperature when A and B are mixed is 16ºC and when B and C are mixed is 23ºC. The temperature when A and C are mixed is
Text Solution
Verified by ExpertsThe correct answer is:
C
Heat gain = heat lost
C A (16 –12) = C B (19 – 16) ⇒ ⇒ 
= 
and C B (23 – 19) = C C (28 – 23) ⇒ ⇒ 
= 
⇒ ⇒ 
...(i)
If θ θ is the temperature when A and C are mixed then,
= 
⇒ ⇒ 
...(ii)
On solving equation (i) and (ii) θ θ = 20.2ºC.
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