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MOE

moeMOE, yake az holathoi agregatii moddaro guyand (holathoi digari agregatii modda — sakht va geshakl). Sohai mavjudiyati Moeho bayni harorathoi guzarish ba holati sakhti (kristallizasiya) va guzarish ba ho­lati gazi (bugshavi) voqe ast. Moeho bo yak qator khosiyathoi khud ham ba jismi sakht va ham ba gazho shabohat dorand, Mas., khosiyati izotropi va shakli muayyan nadoshtani Moe onro ba gaz, vale zichii kalon, kam tazyiqpazii budan va tasiri mutaqobili zuri bayni molekulahoyashon onro ba qismi sakht monand mekunad. Gayr az in, tahlili reptgenostrukturi ayon namud, ki mole­kulahoi Moe betartib (khaotiki) nabuda, balki dar hajmhoi khurd nisbat ba yakdigar bo tartibi muayyan joy giriftani molekulahoi hamshafat joy dorad. Yane har yak zarraro az masofai nazdiktarii shumorai muayyani zarrahoi hamshafat ihota mekunad. Ehtimoli dar in yo on nuqtai hajmi Moe voqe gardidani chande az molekulahoi on ba mavqei molekulahoi digari Moe vobasta ast. Chunin aloqamandii ehtimoli va joygirshavii molekulahoi Moe miqdoran bo funksiyahoi taqsimot ifoda meyoband. Soddatarini onho — funksiyai taqsimoti radiali S (g) joygirshavii radialii zarrahoi Moe soddai yakjinsaro ifo­da mekunad. Agar G(r) malum bo­shad (onro az tadqiqi parokanishi nurhoi rentgeni, neytronho va elektronho muayyan mekunand), muodilan holati Moe va kharakteristikahoi kinetikii onro yoftan mumkin ast. Lappishhoi haroratii molekulahoi Moe az mavqei muvozinat bo basomade ba amal meoyand, ki ba hisobi miyona ba basomadi lappishi atomhoi kristall nazdik buda, amplitudaashon az rui «hajmi ozode», ki molekulahoi hamshafat dar atrofi har molekula ba vujud ovarda meta­vonand, muayyan karda meshavad. Chu­nin holathoi muvozinati molekulaho lahzavi va noustuvorand, binobar on Moe ba khosiyathoi khuddifuziya va jorishavandagi sohib ast. Moeho (gayr az kristallhoi moe va geliy) faqat yak modifika­siya dorand. Sathhoi judoshavii du faza (mas., Moe va gaz) baroi Moe bo kashishi sathi kharakternok ast. Dar hududi se faza (gaz — Moe jismi sakht) hodisai tarkuni mushohida meshavad (nig. Hodisahoi sathi). Khosiyathoi termodinamikii Moehoro az rui muodilai holat r = = f(T, V), ki vobastagii bayni fishor r harorati mutlaq T va hajmi khos K-ro muqarrar mekunad, muayyan kardan mumkin ast. Muodilai Vander-Vaals soddatarin muodilai holat meboshad. Nazariyai statistikii hoziran Moe tarkib va himai khosiyathoi Moero bo majmui funksiyahoi taqsimoti mavqei guruhhoi zarraho muayyan mekunad. Az in ru, vazifai asosii nazariyai Moe az omukh­tani funksiyahoi taqsimot va daryoftani muodilahoi holat iborat ast.

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SATHI VINTI

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