Determine the latent heat of vaporization of unknown substance \( X \) in \( \mathrm{kcal} / \ma...
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0Determine the latent heat of vaporization of unknown substance \( X \) in \( \mathrm{kcal} / \mathrm{g} \) if \( 3.0 \mathrm{~g} \) of boiling liquid \( X \) are completely vaporized in \( 1.5 \) hours by an input of \( 10 \mathrm{kcal} / \mathrm{h} \) into the system by an energy source.
(A) \( 5 \mathrm{kcal} / \mathrm{g} \)
(B) \( 15 \mathrm{kcal} / \mathrm{g} \)
(C) \( 27 \mathrm{kcal} / \mathrm{g} \)
(D) \( 30 \mathrm{kcal} / \mathrm{g} \)
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