Qhov sib txawv tseem ceeb ntawm kev sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient yog qhov sib npaug ntawm lub xeev tuaj yeem siv rau ob theem ua kua thiab roj, qhov kev ua haujlwm coefficient tsuas yog siv rau cov pa roj xwb.
Kev sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient yog cov ntsiab lus tseem ceeb ntawm cov tshuaj. Kev sib npaug ntawm lub xeev tuaj yeem txhais tau tias yog qhov sib npaug ntawm qhov ntsuas kub muaj feem cuam tshuam nrog lub xeev hloov pauv piav qhia txog lub xeev ntawm cov teeb meem ntawm qee lub cev. Kev ua haujlwm coefficient yog qhov tseem ceeb hauv cov thermodynamics rau kev suav ntawm kev sib txawv uas los ntawm tus cwj pwm zoo hauv kev sib xyaw ntawm cov tshuaj lom neeg.
Kev sib npaug ntawm Xeev yog dab tsi?
Kev sib npaug ntawm lub xeev tuaj yeem txhais tau tias yog qhov sib npaug ntawm qhov ntsuas kub uas muaj feem xyuam nrog lub xeev cov kev hloov pauv piav qhia txog lub xeev ntawm cov teeb meem ntawm qee lub cev. Lub cev tej yam kev mob uas yuav tsum tau teev muaj xws li siab, ntim, kub, thiab nyob rau hauv lub zog. Qhov kev sib npaug no tseem ceeb heev hauv kev piav qhia cov khoom ntawm cov kua dej, cov kua dej sib tov, cov khib nyiab, thiab lwm yam.
Tsis muaj qhov sib npaug ntawm lub xeev piav txog cov khoom ntawm txhua yam khoom raug raws li txhua yam kev mob. Yog li ntawd, peb piav qhia txog cov khoom siv lub xeev zoo tshaj plaws ntawm cov khoom. Piv txwv li, txoj cai roj zoo tagnrho yog ib hom kev sib npaug ntawm lub xeev. Qhov kev sib npaug no yog kwv yees li qhov tseeb rau qhov tsis muaj zog polar gases thaum tsis tshua muaj siab thiab ntsuas kub nruab nrab.
Daim ntawv dav dav ntawm kev sib npaug ntawm lub xeev tuaj yeem muab tau raws li hauv qab no:
f(p,V,T)=0
Ntawm no, p yog qhov siab kawg, V yog ntim, thiab T yog qhov kub thiab txias. Classical ideal gas law, quantum ideal gas law, cubic equations of state, non-cubic equations of state, virial equations of state, SAFT equations of state, multiparameter equations of state, etc., yog qee hom kev sib npaug ntawm lub xeev.
Kev Ua Haujlwm Coefficient yog dab tsi?
Kev ua coefficient yog ib qho tseem ceeb siv nyob rau hauv thermodynamics rau accounting ntawm deviations uas los ntawm zoo tagnrho tus cwj pwm nyob rau hauv ib tug sib tov ntawm cov tshuaj. Thaum xav txog qhov sib tov zoo, qhov kev sib cuam tshuam ntawm microscopic ntawm khub ntawm cov tshuaj lom neeg feem ntau zoo sib xws. Yog li ntawd, peb tuaj yeem nthuav qhia cov khoom ntawm cov khoom sib tov ncaj qha nyob rau hauv cov nqe lus ntawm cov ntsiab lus yooj yim los yog ib feem ntawm cov khoom tam sim no. Ib qho piv txwv ntawm qhov no yog Raoult txoj cai. Peb tuaj yeem muab qhov sib txawv ntawm lub tswv yim los ntawm kev hloov kho qhov concentration siv qhov kev ua haujlwm coefficient. Qhov txawv ntawm qhov kev ua haujlwm coefficient yog fugacity coefficient.
Daim duab 01: Kev Ua Haujlwm Coefficient rau kev sib xyaw ntawm Chloroform thiab Methanol
Feem ntau, peb tuaj yeem txiav txim siab qhov ua haujlwm coefficient los ntawm kev sim. Qhov no yog ua los ntawm kev ntsuas ntawm cov khoom sib xyaw uas tsis zoo. Ob txoj hauv kev loj yog txoj kev siv hluav taws xob hluav taws xob thiab txoj kev dilution infinite. Piv txwv li. Peb tuaj yeem tau txais qhov kev ua haujlwm coefficient rau binary sib tov ntawm qhov tsis muaj qhov sib txawv ntawm txhua qhov khoom.
Dab tsi yog qhov sib txawv ntawm Kev Sib Txuas Hauv Xeev thiab Kev Ua Haujlwm Coefficient?
Kev sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient yog cov ntsiab lus tseem ceeb ntawm cov tshuaj. Kev sib npaug ntawm lub xeev yog ib qho kev sib npaug ntawm qhov sib npaug ntawm lub xeev uas piav txog lub xeev ntawm cov teeb meem ntawm qee lub cev thaum lub cev ua haujlwm yog ib qho tseem ceeb siv hauv thermodynamics rau kev suav ntawm kev sib txawv uas los ntawm tus cwj pwm zoo hauv kev sib xyaw ntawm cov tshuaj lom neeg. Qhov sib txawv tseem ceeb ntawm kev sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient yog qhov sib npaug ntawm lub xeev tuaj yeem siv rau ob theem ua kua thiab roj, qhov kev ua haujlwm coefficient tsuas yog siv rau cov pa roj. Tsis tas li ntawd, qhov sib npaug ntawm lub xeev yog qhov nyuaj rau kev siv whereas cov dej num coefficient yog qhov yooj yim rau kev siv.
Cov infographic hauv qab no teev qhov sib txawv ntawm qhov sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.
Summary – Equation of State vs Activity Coefficient
Kev sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient yog cov ntsiab lus tseem ceeb ntawm cov tshuaj. Qhov sib txawv tseem ceeb ntawm qhov sib npaug ntawm lub xeev thiab kev ua haujlwm coefficient yog qhov sib npaug ntawm lub xeev tuaj yeem siv tau rau ob theem ua kua thiab roj, qhov kev ua haujlwm coefficient tsuas yog siv rau cov pa roj xwb.
