midsum sem1 XI
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Pada sebuah tabung reaksi terdapat larutan HCI dan larutan Na2CO3. Yang merupakan Sistem dari percobaan tersebut yaitu.....
Tabung reaksi, larutan HCI, dan udara di sekitar tabung reaksi
Tabung reaksi, larutan Na2CO3,dan udara di sekitar tabung reaksi
Larutan HCI, larutan Na2CO3, dan hasil reaksi
Kalor yang terbentuk dari hasil reaksi antara larutan HCI, dan Na2CO3
Perubahan entalpi yang terjadi pada reaksi antara larutan HCI, dan Na2CO3
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Pernyataan yang benar tentang reaksi endoterm adalah.....
Entalpi awal lebih besar dari entalpi akhir dan ∆H>0
Entalpi awal lebih kecil dari entalpi akhir dan ∆H>0
Entalpi awal lebih besar dari entalpi akhir∆H<0
Entalpi awal lebih kecil dari entalpi akhir ∆H<0
Entalpi awal sama dengan entalpi akhir ∆H=0
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
C2H4(s) + 3O2(g) → 2CO2(g) + 2H2O(g), ∆H = x kJ. Maka nilai x merupakan harga entalpi reaksi
Pembentukan C2H4
Penguraian C2H4
Pembakaran C2H4
Pembentukan CO2
Pembentukan H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Persamaan reaksi: 2CO(g) + O2(g) → 2CO2(g) ∆H = +136,6 kkal,
menyatakan bahwa pembakaran 1 mol senyawa CO terjadi perubahan entalpi sebesar....
+ 136,6 kkal
+ 68,3 kkal
- 68,3 kkal
- 136,6 kkal
- 36,6 kkal
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Karbon sebanyak 4 mol direaksikan dengan 4 mol gas Hidrogen, akan terbentuk 2 mol gas Etena (C2H4) yang membutuhkan kalor sebesar 104,6 kJ. Persamaan termokimianya adalah...
4C(s) + 4H2(g) → 2C2H4(g) ∆H = +209,2 kJ
4C(s) + 4H2(g) → 2C2H4(g) ∆H = +104,6 kJ
4C(s) + 4H2(g) → 2C2H4(g) ∆H = - 104,6 kJ
2C(s) + 2H2(g) → C2H4(g) ∆H = - 104,6 kJ
2C(s) + 2H2(g) → C2H4(g) ∆H = +104,6 kJ
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Suatu molekul mempunyai 4 pasang elektron di sekitar atom pusat yaitu 2 PEB dan 2 PEI. Bentuk molekul yang paling mungkin adalah...
Segitiga datar
Segi empat planar
Tetrahedron
Bentuk T
Bentuk V
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Perhatikan konfigurasi elektron unsur berikut:
S : 1s2 2s2 2p6 3s2 3p4
F : 1s2 2s2 2p5
Atom pusat pada SF4 mengalami hibridisasi....
sp
sp2
sp3
D. sp3d
E. sp3d2
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