Molyar massa

?ddiy yoki mur?kk?b m?dd? v? uning m?ss?si o�rt?sid?gch �b?g�liqlikni o�rn?tnsh uchun m?lyar m?ss? tushunch?sid?n f?yd?l?nil?di.

M?lyar m?ss? (M yoki r) m?ss?ning m?dd? miqd?rig? nisb?tidir. Uning birligi ??lq?r? birlikl?r tizimiid? kil?gr?mm t?qsim m?l (kg/m?l).

Shuningd?k, gr?mm t?qsim m?l (g/m?l) birligini h?m ishl?tish mumkin. M?s?l?n, ugl?r?d (IV) ?ksid � S?₂ ning m?lyar m?ss?si 44 g/m?l g? t?nt (44 g em?s!); sulf?t kisl?t? � H₂S?₄ ning m?lyar m?ss?si 98 g/m?l g? t?ng (98 g em?s!) v? h?k?z?.

Etil spirtining yonish� r??ksiyasi:

C₂H₅?H + 3 ?₂ = 2 C?₂ + 3 H₂?

uchun ushbu mun?s?b?t o�rinli: 1 m?l etil spirtd?n 2 m?l C?₂ h?sil bo�l?di, d?m?k, 46 g/m?l C₂H₅?H d?n 2�44=; =88 g/m?l C?₂ h?sil bo�l?di.

M?l v? m?lyar m?ss? tushunch?l?rini o�z?r? q?nd?y b?g�l?sh mumkin? ?ddiy yoki mur?kk?b m?dd?ning m?ll?r s?ni p ?yni m?dd? m?ss?si � t ning shu m?dd? m?lyar m?ss?si M g? nisb?tig? t?ng:

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n=m/M

?ksinch?,� m?dd?ning m?ss?si � t m?lyar m?ss?� M ning m?dd? miqd?ri p g? ko�p?ytm?sid?n� ib?r?t:

t = M�p.

G?zsim?n v? bug�sim?n m?dd?l?rning m?lyar m?ss?si h?md? univ?rsi?l g?z d?imiysi M?nd?l??v � Kl?p?yr?n t?ngl?m?sid?n� quypd?gich?�� his?bl?b� chiq?ril?di:

M?�lumki, b?simning ??lq?r? birlikl?r tizimiid?gi o�lch?v birligi �p?sk?l (P?). P?sk?l� 1 Nyut?n�� (1�� N)�� kuch�� t?�sirid?�� 1�� m?tr�� kv?dr?t�� (1�� m²)�� yuz? sirtig? t?ng t?qsiml?nuvchi b?simdir (1 P?=1N/m²).�� SHund?y

qilib, 1 ?tm = 760 mm sim?b ustuni 10⁵ P? = 0,1 MP?. His?bl?shl?r ?niq bo�lishi uchun quyid?gi k?effitsi?ntl?rd?n f?yd?l?n?miz: 1 ?tm = 10,1�10⁴ P? ; 1 mm sim?b ustuni = 1,33�10² P?. H?jm ??lq?r? birlikl?r tizimiig? bin??n m?tr kub� (m³) d? if?d?l?n?di. Birlikl?rni

R =pV/T (m?lyar s?ni p = 1 bo�lg?nd?) if?d?g? qo�yib v? m?�yoriy sh?r?itd? p?1.01�10⁵ P?,

V? 0,0224 m³, T = 273 K ek?nligini his?bg? ?lib v?, shuningd?k, 1 m?l id??l g?z eg?ll?ydig?n h?jmning m?�lumligini bilg?n h?ld? quyid?gig? eg?� bo�l?miz:

D?m?k, ??lq?r? birlikl?r tizimid? univ?rsi?l g?z d?imiysi qiym?ti R = 831�� J/(m?l�K)�� ek?n.

M?s?l?n, shung? ?s?s?n, M?nd?l??v�Kl?p?yr?n t?ngl?m?si bo�yich? 273 K h?md?10⁵ P? v? 1 m³ g?z ning m?ss?si 0,00205 kg bo�lg?nd? ?yni g?zning m?lyar m?ss?si quyid?gich? his?bl?n?di:

M=0.00205�8.31�273/1�10⁵= 0.46�10^-6kg/mol

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Bu y?rd? yan? shuni h?m ?ytib o�tish l?zimki, k?tt?likning �o�lch?mligi� v? �birligi� d?yilg?nd? ?l??id?� o�zich? must?qil tushunch?l?rni ?ngl?m?q k?r?k, m?s?l?n, b?simning o�lch?mligi

L^-1MT^-2; o�lch?v birligi es? � p?sk?l (P?).

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