When 100g of liquids L1 at 78°C was mixed with Xg of liquid L2 at...

JAMB 1994

When 100g of liquids L1 at 78°C was mixed with Xg of liquid L2 at 50°C, the final temperature was 66°C. Given that the specific heat capacity of L2is half that of L1, find x

A. 50g
B. 100g
C. 150g
D. 200g

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Correct Answer: Option C

Explanation

Heat lost by L1 = heat gained by L2

cL1 = 2cL2

100 x 2cL2 x (78 - 66)

= xg x cL2 x (66 - 50)

xg = 150g

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When 100g of liquids L1 at 78°C was mixed with Xg of liquid L2 at...

Correct Answer: Option C

Explanation

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