«fizik-kimyo»

Tajriba jarayonida 5 va 8 jo‘mraklar yopiq bo‘lishi kerak! 5-jo‘mrak faqat tuzumni bosimini o‘zgartirish uchun ochib-yopiladi!
P_s = P_a – P_mquyidagicha hisoblanadi (mm. simob ustuni),
P_a – tajriba o‘tkazilayotgandagi atmosfera bosimi bo‘lib, barometrdan yozib olinadi (mm. simob ustuni),
P_m – manometrdagi bosim (mm.simob ustuni),
P_s– sistemadagi bosim,
lgP_s esa, P_s son qiymatining logarifmi,
^T_q^{– qaynash harorati, termometrdan yozib olinadi.}
Olingan natijalar lgP = f(1/T) koordinata o‘qlariga qo‘yib, tenglama asosida ∆H topiladi.

Tajribada olingan natijalarini qayd qilish jadvali:

T/r	Modda (suyuqlik)	Pa	Pm	Ps	lgPs	tq	Tq	1/T·10^-3
1	Benzol		200
2	- II -		150
3	- II -		100
4	- II -		50
5	- II -		0

I
sh hisoboti: qaynash harorati bosim bilan o‘zgaradi va Klauzius- Klapeyron tenglamasi orqali ifodalanadi.
18.2-rasm.Haroratni bosim bilan bog‘liqlik grafigi

 bunda topiladi.

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Nazorat Savollari

1. Eritmalar qanday sinflarga bo’linadi?

2. Eritma konsentratsiyasini ifodalash usullari.
3. Eritmalar hosil bo’lishi fizik-kimyoviy nuqtai nazardan qanday tushuntiriladi?
4. Termodinamik jihatdan eritmalarning sinflanishi.
5. Eritmaning ekstensiv termodinamik xossasini tushuntiring.
6. Parsial molyar kattalik nima?
7. Parsial molyar kattaliklar qanday usullarda hisoblanadi?
8. Gibbs-Dyugem tenglamalarini tushuntiring.