O`zbekiston respublikasi oliy va

Tuzning erish issiqligi quyidagi formula bilan aniqlanadi:

bu еrda Q_e.i - tuzning erish issiqligi;
С - eritmaning solishtirma issiqlik sig’imi, u 4,18 kj/g-grad.
Tuzning erish issiqligini nazariy qiymatini 1-jadvaldan olib, tajribada qilingan absolyut ∆Q va nisbiy d_∆ xatolarni quyidagi formulalar yordamida hisoblang:
.
1-jadval

Moddalar	Erish issiqligi kj/g-grad	Moddalar	Erish issiqligi kj/g-grad
КN03	-35,75	ZnSO4	+77,59
NaNO3	-21,08	ZnSO4^.7H20	- 17,9
NH4NO3	-26,90	CuSO4	+66,54
NH4Cl	-16,30	CuSO4^.5H2O	-11,70
K2SO4	-26,88	Na2SO4	+2,30
Na2CO3	+23,60	Na2SO4^.10H2O	-78,51
Na2CO3^.10H2O	-66,58	KOH	+53,18

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LABORATORIYA ISHI № 5
Kimyoviy kinetika va muvozanat
Ishning bajarilishi
1. Kerakli jihozlar: probirkalar, 100⁰C gacha aniqlikda haroratni o`lchovchi termometr, sekundomer yoki soat, elektroplitka.