Video: Vim li cas thiaj li tawg ntawm LiCl exothermic?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
LiCl . Vim tias Li + ion me dua Na + ion, Coulombic attractions ntawm ions hauv LiCl muaj zog tshaj hauv NaCl. (f) Lub lattice enthalpy ntawm LiCl ispositive, qhia tias nws siv lub zog los rhuav tshem cov ions apartin LiCl . Txawm li cas los xij, lub Dissolution ntawm LiCl hauv dej exothermic txheej txheem.
Nyob rau hauv txoj kev no, yog lub tshav kub ntawm kev daws rau LiCl exothermic los yog endothermic?
Teb thiab piav qhia: Lub Thaum tshav kub kub ntawm kev daws rau LiCl yog exothermic . Thaum lithium thiab chloride ionize hauv dej, lawv yuav tsum xub sib cais ntawm ib leeg.
Yog vim li cas yog lub dissolving ntawm ib tug ntsev Tej zaum ib tug exothermic? Lub zog raug tso tawm mus rau hauv kev daws teeb meem thaum cov dej molecules nyob ib puag ncig cov ions: raws li cov dej molecules attractedto thiab nyob ib puag ncig cov ions, lub zog raug tso rau hauv cov tshuaj. dissolving ntawm ntsev yog exothermic orendothermic nyob ntawm seb qhov twg ntau dua, Lattice Energy, lossis Hydration Energy.
Ib yam li ntawd, tib neeg nug, vim li cas qee qhov kev sib cais tawm ntawm exothermic?
Cov txheej txheem ntawm yaj yog exothermic Thaum lub zog ntau dua tso tawm thaum dej molecules "bond" rau cov kuab tshuaj dua li siv los rub cov soluteapart. Vim tias muaj zog ntau dua li siv, cov molecules ntawm cov tshuaj txav nrawm dua, ua rau qhov kub thiab txias.
Puas yog qhov tawg ntawm ammonium chloride endothermic?
Ntawm chav tsev kub (T = 300K), dissolution ntawm ammonium chloride yog ib endothermic txheej txheem, vim qhov kev daws teeb meem xav tias txias dua li cov khoom NH4 Cl dissolves nyob rau hauv dej thiab absorbs zog los ntawm dej ua li ntawd. Yog li ntawd lub enthalpy ntawm kev tawg yog POSITIVE.
Pom zoo:
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Teb thiab piav qhia: Lub tshav kub ntawm kev daws rau LiCl yog exothermic. Thaum lithium thiab chloride ionize hauv dej, lawv yuav tsum xub sib cais los ntawm ib leeg
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