A mass of a liquid at 30oC is mixed with a mass of the same...

JAMB 1997

A mass of a liquid at 30^oC is mixed with a mass of the same liquid at 70^oC and the temperature of the mixture is 45^oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid.

A. 3 : 5
B. 5 : 3
C. 3 : 7
D. 7 : 3

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Correct Answer: Option B

Explanation

Heat lost = heat gained

m_H x c x (70 - 45) = m_c x c x (45 - 30)

\(\frac{m_c}{m_H}\) = \(\frac{5}{3}\)

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A mass of a liquid at 30oC is mixed with a mass of the same...

Correct Answer: Option B

Explanation

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