A quantity of steam at 100oC condenses to water at the same temperature by releasing...

WAEC 2006

A quantity of steam at 100^oC condenses to water at the same temperature by releasing 6.9 x 10⁴J of energy. Calculate the mass of the condensed steam. [specific latent heat of vaporization of eater = 2.3 x 10⁶ J kg^-1]

A. 3.0 x 10^-1 kg
B. 3.0 x 10^-2 kg
C. 3.0 x 10^-3 kg
D. 3.0 x 10^-4 kg

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Correct Answer: Option B

Explanation

M = \(\frac{Q}{T} = \frac{6.9 \times 10^{4}}{2.3 \times 10^6} = 3 \times 10^{-2} kg\)

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A quantity of steam at 100oC condenses to water at the same temperature by releasing...

Correct Answer: Option B

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