Termokimia
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
saaa parkchan
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pernyataan berikut yang tidak tepat pada reaksi eksoterm adalah
sistem melepas panas, lingkungan menerima panas
Suhu awal lebih rendah daripada suhu akhir
Entalpi sistem berkurang, entalpi lingkungan bertambah
Wadah terasa dingin / terjadi penurunan suhu
Perubahan entalpi negatif
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dibawah ini reaksi pembentukan gas ammonia pada keadaan standar yang benar adalah.....
N + 3H → NH3
N2 + H2 → 2NH3
½ N₂ + ³/₂ H₂ → NH₃
NH3 → ½ N₂ + ³/₂ H₂
N2 + H2 → 2NH3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
perhatikan reaksi termokimia dibawah ini !
2S + 3O2 → 2SO3 ΔHf=−800kJ
Besar kalor untuk ∆Hd° pada reaksi tersebut adalah.....
+800 kj
-400 kJ
-600 kj
-200 kJ
+400 kJ
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
HCl(g) → HCl(aq) ∆H = –75,14 kJ.mol⁻¹
Reaksi diatas merupakan.....
∆Hf°
∆Hc°
∆Hd°
∆Hs°
∆Hn°
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Tuliskan reaksi singkat penguraian dari Al₂O₃
2Al(s) + 3/2 O2(g) → Al₂O₃ (s)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada reaksi di bawah ini
C6H6(l) + 7.5 O2(g) → 6CO2(g) + 3H2O(l) ΔH=−3267.4 kJ
Pernyataan yang benar adalah....
Reaksi pembakaran benzena melepaskan kalor sebesar 3267,4 kJ
Reaksi benzene dengan oksigen memerlukan kalor sebanyak 3267,4 kJ
Reaksi tersebut menghasilkan 3267,4 kJ energi untuk setiap 6 mol karbon dioksida yang terbentuk, dan termasuk reaksi endoterm.
Reaksi tersebut termasuk reaksi pembentukan karena menghasilkan senyawa dari unsur-unsurnya.
Reaksi tersebut merupakan reaksi dekomposisi karena memecah benzena menjadi karbon dioksida dan air.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan persamaan reaksi termokimia:
1. NaCl(s) → Na(s) + 1/2 Cl₂(g) ∆H = + x kJ/mol
2. CH₄(g) +20₂(g) → CO2(g) + 2H₂O(g) ∆H = -x kJ/mol
3. 1/2 N2(g) + 3/2 H2(g) → NH3(g) ΔΗ = -x kJ/mol
4. H2 (g) + 1/2 O2(g) -> H2O(l) ΔH= - x kJ /mol
5. 2C(s) + 3H2 (g) + 1/2 O2(g) -> C2H5OH(l) ΔH=-x kJ/mol
Persamaan reaksi yang merupakan ∆H°p, ∆H°d, dan ∆H°c adalah ....
1,2 dan 3
2,3 dan 4
3,1 dan 2
3,4 dan 5
1,2 dan 4
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