Soal Ujian Semester Ganjil Kimia Kelas XI.MIPA

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Chemistry
•
University
•
Medium
sri Agustina Habibie Habibie
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20 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Protein sangat bermanfaat bagi tubuh kita. protein merupakan salah satu senyawa karbon yang berguna di bidang ....
Seni
Papan
Pangan
Sandang
esensial
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pernyataan di bawah ini yang sesuai dengan reaksi eksoterm adalah ....
entalpi awal sistem > entalpi akhir sistem dan DH positif.
entalpi awal sistem < entalpi akhir sistem dan DH positif.
entalpi awal sistem > entalpi akhir sistem dan DH negatif.
entalpi awal sistem < entalpi akhir sistem dan DH negatif.
entalpi awal sistem = entalpi akhir sistem dan DH nol.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui reaksi :
C3H8(g) + 5O2(g) →3CO2(g) + 4H2O DH = + X kkal. Reaksi tersebut dapat juga disebut ....
kalor pembentukan CO2
kalor pembentkan H2O
kalor pembentukan CO2 dan H2O
kalor netralisasi C3H8 dan H2O
kalor pembakaran C3H8
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui persamaan termokimia :
C2H2(g) + O2(g) → CO2(g) + H2O(l) ∆H = -2372,4 KJ
Pada pembakaran sempurna 5,6 liter C2H2 (STP) delta H . . .
Diserap 296,55 KJ
Dibebaskan 296,55 KJ
Entalpi sistem bertambah sebesar 296,55 KJ
Memerlukan 593,1 KJ
Membebaskan 593,1 KJ
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan reaksi berikut:
2Fe(s) + 3/2 O2 (g) → Fe2O3 (s) ∆H = -840 kJ
2Al(s) + 3/2 O2 (g) → Al2O3 (s) ∆H = -1680 kJ
Perubahan entalpi untuk reaksi di bawah ini
2Al(s) + Fe2O3 (s) → 2Fe(s) + Al2O3 (s) adalah ….
+840 kJ
-840 kJ
+2520 kJ
-2520 kJ
+210 Kj
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui data energi ikatan rata-rata dari :
C = C = 146 Kkal / mol
C - Cl = 79 Kkal / mol
C – C = 83 Kkal / mol
H – Cl = 103 Kkal / mol
C - H = 99 Kkal / mol
Maka perubahan entalpi pada adisi etena dengan asam klorida menurut persamaan reaksi :
C2H4 + HCl → C2H5Cl adalah sebesar . . ..
- 12 Kkal
+12 KKal
-72,8 KKal
-510 Kkal
+510 Kkal
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui perubahan entalpi pembentukan standar (AHof) C2H4(g) = -52 KJ/mol;
H2O = -286 KJ/mol;
C2H5OH = -278 KJ/mol.
Harga perubahan entalpi reaksi:
C2H4 + H2O ---) C2H5OH adalah ….
+ 35 KJ/mol
- 35 KJ/mol
+ 60 KJ/mol
-60 KJ/mol
+ 80 KJ/mol
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