Qhov sib txawv tseem ceeb ntawm daim ntawv cog lus enthalpy thiab lattice enthalpy yog tias daim ntawv cog lus enthalpy yog lub zog uas yuav tsum tau ua kom tawg cov tshuaj lom neeg, thaum lub lattice zog yog lub zog uas yuav tsum tau ua ib qho mole. ntawm ib qho ionic compound los ntawm cations thiab anions hauv lub xeev gaseous.
Ob nqe lus no piav qhia txog kev sib pauv hluav taws xob ntawm lub cev thiab nws ib puag ncig. Bond enthalpy yog qhov ntxeev ntawm lub lattice enthalpy. Bond enthalpy piav qhia txog kev sib tsoo thaum lattice enthalpy piav txog kev tsim daim ntawv cog lus. Qhov no yog vim li cas lawv yog opposite phenomena rau ib leeg.
Bond Enthalpy yog dab tsi?
Bond enthalpy yog tus nqi ntawm lub zog uas yuav tsum tau rhuav tshem cov tshuaj lom neeg. Yog tias peb siv tus qauv txhais ntawm no, nws hais tias daim ntawv cog lus enthalpy yog qhov hloov pauv enthalpy thaum ib mole ntawm daim ntawv cog lus tau tawg rau hauv ib yam khoom ntawm 298 K. Txij li cov lus no cuam tshuam nrog kev sib tsoo, peb tuaj yeem muab nws lub npe hu ua bond dissociation zog thiab. Lwm cov ntsiab lus suav nrog lub zog ntawm daim ntawv cog lus thiab lub zog nruab nrab ntawm daim ntawv cog lus.
Daim duab 01: Bond Energies of Some Chemical Bonds
Yog tias tus nqi ntawm daim ntawv cog lus enthalpy siab, nws txhais tau tias daim ntawv cog lus muaj zog heev thiab nyuaj rau kev tawg. Yog li ntawd, nws yuav tsum muaj zog ntau dua los rhuav tshem qhov kev sib raug zoo. Feem ntau, cov chav nyob uas peb siv rau kev txiav txim siab ntawm tus nqi rau daim ntawv cog lus enthalpy yog kcal / mol (klocalories ib mole) lossis kJ / mol (kiloJoules ib mole).
Lattice Enthalpy yog dab tsi?
Lattice enthalpy yog tus nqi ntawm lub zog uas yuav tsum tau tsim ib qho mole ntawm ib qho ionic compound raws li tus qauv siv cov cations thiab anions hauv lub xeev gaseous. Txij li thaum peb tab tom soj ntsuam nrog siv lead ua lattices ntawm no, lub sij hawm lattice enthalpy yog siv rau siv lead ua lattices; Hauv lwm lo lus, nws yog siv rau cov khoom sib txuas. Nws yog ib qho kev ntsuas ntawm lub zog uas khi cov ions ua ke (cov rog sib koom ua ke).
Daim duab 02: Tus Qauv Lattice
Feem ntau, lub zog lattice yog qhov tseem ceeb hauv kev txiav txim siab ntawm qee lub cev, suav nrog kev solubility ntawm cov muaju, hardness thiab volatility. Feem ntau, lattice zog yog lub zog tsis zoo, tab sis lattice enthalpy yog tus nqi zoo. Qhov no yog vim qhov ntim ntawm mole ntawm crystalline khoom txo qis thaum tsim cov lattice.
Qhov txawv ntawm Bond Enthalpy thiab Lattice Enthalpy yog dab tsi?
Bond enthalpy yog cov txheej txheem rov qab rau lattice enthalpy txij li daim ntawv cog lus enthalpy cuam tshuam nrog kev sib tsoo thaum lattice enthalpy cuam tshuam nrog kev tsim daim ntawv cog lus. Yog li ntawd, qhov sib txawv tseem ceeb ntawm daim ntawv cog lus enthalpy thiab lattice enthalpy yog cov nyiaj enthalpy yog lub zog uas yuav tsum tau rhuav tshem cov tshuaj lom neeg thaum lub lattice zog yog lub zog uas yuav tsum tau ua ib qho mole ntawm ib qho ionic compound los ntawm cov khoom siv hluav taws xob. cations thiab anions hauv lub xeev gaseous. Bond enthalpy yog qhov hloov pauv enthalpy thaum ib mole ntawm daim ntawv cog lus tawg hauv cov khoom ntawm 298 K. Yog li ntawd, peb tuaj yeem hu nws ua daim ntawv cog lus dissociation enthalpy thiab.
Summary – Bond Enthalpy vs Lattice Enthalpy
Bond enthalpy deals nrog kev sib tsoo thaum lattice enthalpy deals nrog daim ntawv cog lus. Yog li ntawd, qhov sib txawv tseem ceeb ntawm daim ntawv cog lus enthalpy thiab lattice enthalpy yog cov nyiaj enthalpy yog lub zog uas yuav tsum tau rhuav tshem cov tshuaj lom neeg thaum lub lattice zog yog lub zog uas yuav tsum tau los ua ib qho mole ntawm ib qho ionic compound los ntawm cov khoom siv hluav taws xob. cations thiab anions hauv lub xeev gaseous.
