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How much heat is emitted when 4.54 g of water condenses at 25 ∘C? The heat of vaporization of water at 25 ∘C is 44.0 kJ/mol.?
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- Uncle MichaelLv 72 weeks agoFavorite Answer
Molar mass of water (H₂O) = (1.0×2 + 16.0) g/mol = 18.0 g/mol
Moles of water condensed = (4.54 g) / (18.0 g/mol) = 0.252 mol
Heat emitted = (0.252 mol) × (44.0 kJ/mol) = 11.1 kJ
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OR:
(4.54 g water) × (1 mol water / 18.0 g water) × (44.0 kJ of heat) / (1 mol water)
= 11.1 kJ of heat
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