
Thermokimia
Authored by mustika putri
Chemistry
11th Grade
Used 65+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Persamaan termokimia berikut merupakan reaksi endoterm, kecuali,......
H2(g) + Br2(g) → 2HBr(g) - a kkal
Ca(s) + ½O2(g) → CaO(s) + b kkal
3Fe(s) + 4H2O(g) → Fe2O3(g) + 4H2(g) ΔH = +c kkal
4NO(g) + 6H2O(g) → 4NH3(g) + 5O2(g) ΔH = +d kkal
CaCO3 → Ca(s) + C(s) + 3/2O2(g) + e kkal
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pernyataan yang tepat mengenai kalor pembakaran standar adalah,......
kalor yang dilepaskan apabila 1 mol senyawa terurai menjadi unsur unsurnya
kalor yang dilepaskan atau diserap pada pembakaran 1 mol senyawa dalam kondisi standar
kalor yang dilepaskan atau diserap apabila 1 mol senyawa terurai menjadi unsur unsurnya pada kondisi standar
kalor yang dilepaskan atau diserap apabila 1 mol senyawa dibentuk dari unsur unsurnya pada kondisi standar
kalor yang dilepaskan atau diserap apabila 1 mol senyawa dalam bentuknya yang paling stabil terurai menjadi unsur unsurnya
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Perhatikan diagram siklus berikut:
Berdasarkan diagram tersebut, harga x adalah....
-197 kJ
+197 kJ
-1383 kJ
+1383 kJ
- 1970 KJ
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Entalpi pembentukan NH4Cl adalah -315 kJ/mol. Persamaan reaksinya dapat ditulis ……
N + 4H + Cl → NH4Cl ΔH = -315 kJ/mol
N2 + 4H2 + Cl2 → NH4Cl ∆H = -315 kJ/mol
½ N2 + 2H2 + 1/2Cl2 → NH4Cl ΔH = -315 kJ/mol
NH3 + HCl → NH4Cl ∆H = -315 kJ/mol
N2 + H2 + Cl2 → NH4Cl ΔH = -315 kJ/mol
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Proses reaksi di alam yang berlangsung spontan seperti pertunjukan kembang api merupakan salah satu contoh dari reaksi……
Reaksi kimia
Reaksi eksoterm
Reaksi endoterm
Reaksi sistem terbuka
Reaksi perubahan entalp
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dengan menggunakan data energi ikatan rata-rata, hitunglah perubahan entalpi reaksi berikut:
C2H4+H2 → C2H6
ikatan rata-rata C-H= 435
ikatan rata-rata C=C = 612
ikatan rata-rata H-H= 435,9
Perubahan entalpinya dapat di hitung adalah .....
98,3 kj
264,8 kj
-324,23 kj
523,1 kj
-434,1 kj
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui reaksi :
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g) ΔH = -2600 kJ
Jika entalpi pembentukan CO2 dan H2O berturut-turut -395 kJ dan -285 kJ, entalpi pembentukan C2H2 sebesar,....
-450 kJ
-300 kJ
-225 kJ
+225 kJ
+450 kJ
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