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.?
回答 (1)
2021-04-19 8:24 pm
✔ 最佳答案
Molar mass of water (H₂O) = (1.0×2 + 16.0) g/mol = 18.0 g/molMoles 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
收錄日期: 2021-04-23 23:07:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210419121703AA4QEXq