Kelas 11 - Termokimia

Quiz
•
Chemistry
•
10th - 12th Grade
•
Hard
Standards-aligned
Emille Ilmansyah
Used 963+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dari reaksi
2H2(g) + O2(g) → 2H2O(l) ∆H = –572 kJ
dapat dikatakan bahwa...
Kalor pembentukan air adalah –572 kJ
Pembentukan 1 mol air diperlukan 286 kJ
Pada pembakaran 1 mol hidrogen, kalor 572 kJ mengalir dari sistem ke lingkungan
Pada pembentukan 2 mol air, kalor 572 kJ mengalir dari sistem ke lingkungan
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebanyak 2 mol gas hidrogen jika direaksikan dengan 1 mol gas oksigen akan terbentuk uap air yang membutuhkan kalor sebesar 242 kJ. Persamaan termokimianya adalah ....
H2(g) + 1⁄2O2(g) → H2O(g) ∆H = 242 kJ
2H2(g) + O2(g) → 2H2O(g) ∆H = 242 kJ
2H2(g) + O2(g) → 2H2O(g) ∆H = -242 kJ
2H2O(g) → 2H2(g) + O2(g) ∆H = 242 kJ
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Apabila 100 mL larutan NaOH 1M direaksikan dengan 100 mL larutan HCl 1M dalam sebuah bejana, ternyata suhu larutan naik dari 29oC menjadi 37,5oC. Jika kalor jenis
larutan dianggap sama dengan kalor jenis air = 4,2 J/g oC dan massa jenis air = 1g/mL, maka perubahan entalpi reaksi adalah ....
–45,9 kJ/mol
–54,6 kJ/mol
–71,4 kJ/mol
–77,7 kJ/mol
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui reaksi:
4V + 5O2 → 2V2O5 ∆H = –740 kkal
4V + 3O2 → 2V2O3 ∆H = –580 kkal
2V + O2 → 2VO ∆H = –200 kkal
maka ∆H untuk reaksi:
V2O3 + V2O5 → 4VO + 2O2 adalah ....
–280 kkal
–180 kkal
+260 kkal
+100 kkal
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui reaksi:
Entalpi pembakaran C2H4 adalah....
+435 kJ
–435 kJ
+711 kJ
–711 kJ
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berdasarkan diagram hukum Hess berikut, ΔH untuk reaksi A2B → CD2 adalah...
ΔH1 + ΔH2 + ΔH3
ΔH1 + ΔH2 – ΔH3
–ΔH1 + ΔH2 + ΔH3
ΔH1 – ΔH2 – ΔH3
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika kalor pembentukan HCl:
H2(g) + Cl2(g) → 2HCl(g) ∆H = 184,6 kJ
maka kalor yang dibebaskan untuk peruraian 6 liter gas HCl (p,t) di mana 1L gas O2 (Mr = 32) massanya 16 gram adalah ....
27,69 kJ
55,38 kJ
92,3 kJ
276,9 kJ
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