1. . . : , , , . . : . .
2. . . . .
3. . . .
(DH) - , , (Q) :
+ + - = 2; DH = -Q = -57,6 /
-57,6 /. , . , , : q = (t2 - t1)×SC, t2 - , t1 - , SC = C1m1 + C2m2 - , m1 1 m2 2.
(q, ), 75 NaOH (1) 75 H2SO4 (1), 0,075 2. , 1 2, Q = q/0,075 (/).
1. (m1).
2. 75 H2SO4 (1) (t).
3. 100-150 75 NaOH (1M) (t).
4. . (t2).
1. m1 =... .
2. t =... .
3. t =... .
4. t1 = (t + t)/2 =... .
5. t2 =....
6. m2 = 75(r + r) =... ,
r - (/), r - (/). r r 1 /.
7. , q =... .
q = (t2-t1)(c1m1+c2m2)/1000,
1 - , 1 = 0,905 /(×), 2 - , 2= 4,19 /(×).
8.
|
|
= D = -Q = -q/0,075 =... /.
9. = ½( - )/½×100% =...%,
- = -57,6 /, - DH.
1. DH :
) 2Mg + CO2 2MgO + C | ) 4FeS2 + 11O2 2Fe2O3 + 8SO2 |
) MnO2 + 2C 2CO + Mn | ) 4NH3 + 3O2 2N2 + 6H2O() |
) 3Fe3O4 + 8Al 4Al2O3 + 9Fe | ) 2H2S + 3O2 2H2O() + 2SO2 |
( /):
DH(CO2) = -394; | DH(MgO) = -601; | DH(MnO2) = -520; |
DH(CO) = -110; | DH(Fe3O4) = -1118; | DH(Al2O3) = -1675; |
DH(FeS2) = -174; | DH(Fe2O3) = -824; | DH(SO2) = -297; |
DH(NH3) = -46; | DH(H2O()) = -286; | DH(H2S) = -21. |
2. , DH N2O() 82, 0 / DH = -557,5 : () + 2N2O() = 2() + 2N2(), 2().
3. , DH(H2O() = -286 / DH = -196 : 2H2O2 2H2O() + O2; H22
4., DH 2() H2O() -394 -242 / DH = -802 : CH4() + 2O2()= 2H2O() + O2(), CH4().
5. , , :
) N2 () + 3H2 () 2NH3 () | ) 2SO2 () + O2 () 2SO3 () | |
) H2O () H2O () | ) C3H8 () + 5O2 () 3CO2 () + 4H2O() | |
) NH3 () + HCl () NH4Cl (.) | ) 2O3 () 3O2 () | |
6. DG , :
) 2N2O + O2 4NO | ) 2NO + O2 2NO2 |
) N2O + NO NO2 + N2 | ) 2NO2 N2O4 |
) N2O + NO2 3NO | ) N2 + O2 2NO |
( /): DG(N2O) = 104; DG(NO) = 87; DG(NO2) = 51; DG(N2O4) = 98.
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