更新1:
Na- 52.9 EAkJ/mol, 495.5 IE1KJ/mol, 4562 IE2kJ/mol , 98 Ion Radius, pm I . -295.3EAkJ/mol, 1008.4IE1KJ/mol ,1845.9 IE2kJ/mol , 220Ion Radius, pm
Given the following data, estimate the energy released when gaseous Na and I atoms form gaseous [Na+I-].?
回答 (1)
2017-10-14 1:13 am
First IE of Na: Na(g) → Na⁺(g) + e⁻ …… ΔH = +495.5 kJ
First EA of I: I(g) + e⁻ → I⁻(g) …… ΔH = -295.3 kJ
Add the above 2 thermochemical equation, and cancel e⁻ on the both sides.
Na(g) + I(g) → Na⁺(g) + I⁻(g) …… ΔH = [(+495.5) + (-295.3)] kJ = +200.2 kJ
When 1 mole of Na(g) reacts with 1 mole of I(g) to form 1 mole of [Na⁺ I⁻],
200.2 kJ of energy are absorbed (but not released).
First EA of I: I(g) + e⁻ → I⁻(g) …… ΔH = -295.3 kJ
Add the above 2 thermochemical equation, and cancel e⁻ on the both sides.
Na(g) + I(g) → Na⁺(g) + I⁻(g) …… ΔH = [(+495.5) + (-295.3)] kJ = +200.2 kJ
When 1 mole of Na(g) reacts with 1 mole of I(g) to form 1 mole of [Na⁺ I⁻],
200.2 kJ of energy are absorbed (but not released).
收錄日期: 2021-04-18 17:52:44
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https://hk.answers.yahoo.com/question/index?qid=20171013170216AA9tXwd