Qhov Tseem Ceeb Qhov txawv - Lattice Energy vs Hydration Energy
Lattice zog thiab hydration zog yog ob nqe lus hais txog hauv thermodynamics. Lattice zog yog tus nqi ntawm lub zog uas tso tawm thaum lub lattice tsim. Lub zog dej yog lub zog uas tso tawm thaum lub lattice yaj hauv dej. Ob qho tib si tsim thiab hydration ntawm ib lub lattice tso tawm lub zog vim hais tias ob qho tib si txheej txheem koom nrog tshuaj lom neeg (lossis tshuaj lom neeg sib cuam tshuam) tsim. Qhov sib txawv tseem ceeb ntawm lub zog lattice thiab lub zog hydration yog lub zog lattice yog lub zog tso tawm thaum lub mole ntawm lub lattice yog tsim los ntawm infinitely cais ions whereas hydration zog yog tus nqi ntawm lub zog tso tawm thaum lub lattice yog sib cais rau hauv ions los ntawm kev daws teeb meem. dej.
Lattice Energy yog dab tsi?
Lattice zog yog ib qho kev ntsuas ntawm lub zog uas muaj nyob rau hauv cov siv lead ua lattice ntawm ib tug compound, uas yog sib npaug rau lub zog uas yuav tso tawm yog hais tias cov khoom ions raug coj los ua ke los ntawm infinity. Hauv lwm lo lus, lattice zog yog lub zog xav tau hauv kev tsim cov siv lead ua los ntawm cov ions sib cais. Nws yog qhov nyuaj heev los ntsuas lub zog lattice kev sim. Li no, nws yog muab los theoretically.
Daim duab 01: Lub Zog Hluav Taws Xob
Tus nqi ntawm lub zog lattice yog ib txwm muaj qhov tsis zoo. Qhov ntawd yog vim tias kev tsim cov lattice cuam tshuam nrog kev tsim cov tshuaj sib txuas. Kev tsim cov tshuaj bonds yog cov tshuaj tiv thaiv exothermic, uas tso tawm lub zog. Tus nqi theoretical rau lattice zog yog txiav txim raws li hauv qab no.
ΔGU=ΔGH – p. ΔVm
Nyob, ΔGU yog lub zog molar lattice, ΔGH molar lattice enthalpy thiab ΔVmyog qhov hloov ntawm ntim ib mole. P yog lub siab sab nraud. Yog li ntawd, lub zog lattice kuj tuaj yeem txhais tau tias yog txoj haujlwm uas yuav tsum tau ua los tiv thaiv sab nraud, p.
Hydration Energy yog dab tsi?
Hydration zog (los yog enthalpy ntawm hydration) yog tus nqi ntawm lub zog tso tawm thaum ib tug mole ntawm ions undergoes hydration. Hydration yog ib hom tshwj xeeb ntawm kev tawg ntawm ions hauv dej. Ions tuaj yeem raug them zoo lossis tsis zoo them cov tshuaj lom neeg. Thaum cov khoom sib xyaw ionic yaj hauv dej, cov ions sab nraud ntawm cov khoom ntawd txav deb ntawm cov khoom thiab yaj hauv dej. Nyob ntawd, cov ions tso tawm tau npog nrog cov dej nyob sib ze.
Lub hydration ntawm ib qho ionic compound muaj xws li kev sib cuam tshuam intramolecular. Cov no yog kev sib cuam tshuam ion-dipole. Enthalpy ntawm hydration los yog lub zog hydration yog lub zog uas tso tawm thaum ions yaj hauv dej. Lub hydration yog li no cov tshuaj tiv thaiv exothermic. Qhov no yog vim qhov kev sib cais ntawm ions tsim kev sib cuam tshuam ntawm ions thiab dej molecules. Tsim kom muaj kev sib cuam tshuam tso tawm lub zog vim tias cov dej stabilizes cov ions hauv cov kua dej.
Daim duab 02: Dej Na+ thiab Cl- ions
Hydration zog yog denoted li Hhyd Thaum lub hydration energies ntawm txawv ions raug txiav txim, tus nqi ntawm hydration zog txo nrog nce ionic loj. Tias yog vim li cas, thaum qhov loj me ionic nce, lub electron ceev ntawm ion yog txo. Tom qab ntawd qhov kev cuam tshuam ntawm ion thiab dej molecules kuj txo qis ua rau lub zog tsis muaj dej.
Kev sib raug zoo ntawm Lattice Energy thiab Dej Hwjchim yog dab tsi?
Lub zog ntawm kev sib cais yog sib npaug rau cov lej ntawm lub zog lattice thiab hydration zog. Tias yog vim li cas, txhawm rau kom yaj lub lattice hauv dej, lub lattice yuav tsum tau dissociation thiab hydration. Lub lattice yuav tsum tau muab ib tug npaum li cas ntawm lub zog uas yuav dissociate lub lattice rau hauv ions. Qhov no yog sib npaug rau lub lattice zog
Qhov txawv ntawm Lattice Zog thiab Dej Hwjchim yog dab tsi?
Lattice zog vs dej zog |
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| Lattice zog yog ib qho kev ntsuas ntawm lub zog uas muaj nyob rau hauv cov siv lead ua lattice ntawm ib lub compound, sib npaug ntawm lub zog uas yuav tso tawm yog hais tias cov khoom ions raug coj los ua ke los ntawm infinity. | Hydration (los yog enthalpy ntawm hydration) yog lub zog tso tawm thaum ib mole ntawm ions undergo hydration. |
| zog | |
| Lattice zog yog tus nqi ntawm lub zog tso tawm thaum mole ntawm lub lattice yog tsim los ntawm infinitely cais ions. | Hydration zog yog tus nqi ntawm lub zog tso tawm thaum lub lattice tau muab cais ua ions los ntawm kev daws hauv dej. |
| Lattice zog cuam tshuam rau kev tsim cov lattice. | Hydration zog cuam tshuam rau kev puas tsuaj ntawm lub pas nrig. |
Summary – Lattice Energy vs Hydration Energy
Lattice zog cuam tshuam rau kev tsim cov lattice whereas hydration zog cuam tshuam rau kev puas tsuaj ntawm lub lattice. Qhov txawv ntawm lattice zog thiab hydration zog yog lub lattice zog yog tus nqi ntawm lub zog tso tawm thaum ib tug mole ntawm lub lattice yog tsim los ntawm infinitely cais ions whereas hydration zog yog tus nqi ntawm lub zog tso tawm thaum lub lattice yog sib cais rau hauv ions los ntawm kev daws nyob rau hauv dej..
