
Tugas Termokimia 2
Authored by Purwo Rahadityo
Chemistry
11th Grade
Used 7+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ke dalam 50 mL larutan tembaga (II) sulfat 0,4 M ditambahkan serbuk zink (sedikit berlebihan), ternyata suhunya naik 200C. Dengan menganggap bahwa kalor jenis larutan sama dengan kalor jenis air, yaitu 4,18 j/g K dan kapasitas kalor wadah reaksi dapat diabaikan, maka tentukanlah ∆H reaksi :
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
(Massa jenis larutan 1 kg/L = 1 gr/ mL)
-3060,85 kj
-3060,86 kJ
-3061,85 kJ
-3061,86 kJ
-3062,85 kJ
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui data sebagai berikut :
S(s) + 3/2 O2(g) → SO3(s) ∆H = - 395,2 kJ
2SO2(g) + O2(g) → 2SO3(s) ∆H = - 198,2 kJ
Tentukanlah ∆H reaksi : S(s) + O2(g) → SO2(g)
-296,1 kJ
-296,2 kJ
-296,3 kJ
-296,4 kJ
-296,5 kJ
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Entalpi pembentukan standar gas SO3 adalah . . . . .
-394,2 kJ
-395,2 kJ
-396,2 kJ
-397,2 kJ
-398,2 kJ
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui data entalpi pembentukan standar :
C3H8 (g) = -104 kJ/mol
CO2 (g) = -394 kJ/mol
H2O (g) = -286 kJ/mol
Tentukan ∆H reaksi :
C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)
-2222 kJ
-2223 kJ
-2224 kJ
-2225 kJ
-2226 kJ
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Data di atas adalah data energi ikatan rata-rata.
Jika entalpi reaksi :
CH2 =CH2(g) + HCl (g) → CH3CH2Cl(g)
adalah –48 kJ mol–1 , energi ikatan rata-rata C–Cl adalah ....
278 kJ/mol
326 kJ/mol
756 kJ/mol
824 kJ/mol
1648 kJ/mol
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