A quantity of steam at 100oC 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]
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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
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)