
TERMOKIMIA
Authored by Fatin Hamamah
Chemistry
11th Grade
Used 4+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Suatu campuran pereaksi di dalam tabung reaksi meyebabkan tabung tersebut menjadi panas jika dipegang. Penyataan yang tepat mengenai hal tersebut adalah….
Entalpi pereaksi bertambah
Entalpi peraksi berkurang
Entalpi pereaksi dan hasil reaksi bertambah
Entalpi pereaksi lebih besar daripada entalpi hasil reaksi
Entalpi hasil reaksi lebih besar daripada entalpi pereaksi
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diantara persamaan termokimia di bawah ini yang merupakan perubahan entalpi penguraian adalah…
a. b.
c.d.
e.
Mg (OH)2 (s) → Mg (s) + O2 (g) + H2 (g) ΔHo = +925 kJ
C6H12O6 (s) + 6O2 (g) → 6CO2 (g) + 6H2O (l) ΔHo = -2.820 kJ
CaO (s) + CO2 (g) → CaCO3 (s) ΔHo = +1.207 kJ
Ca (s) + C (s) + O2 (g) → CaCO3 (s) ΔHo = -1.207 kJ
2 CO2 (g) + 3H2O (l) → C2H5O H (l) + 3O2 ΔHo = +1.380 kJ
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika diketahui ΔHc°C = -393,5 kJ mol‾¹ , berapa kalor yang terjadi pada pembakaran 1 kg arang, jika dianggap bahwa arang mengandung 48% karbon dan Ar C = 12?
a. 15.740 kJ
b. 15.470 kJ
c. 16.740 kJ
d. 470 kJ
e. 740 kJ
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui :
H2O(l)→ H2O(g) ΔH = + 40 kJ/mol
berapakah kalor yang diperlukan untuk penguapan 4,5 gram H2O (Ar H = 1,0 Ar O = 16) ?
+8 kJ
+9 kJ
+10 kJ
+11 kJ
+12 kJ
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Perubahan entalpi dari reaksi manakah yang berikut ini dapat disebut dengan perubahan entalpi pembentukan ΔHf° Na2SO4 adalah….
2NaOH + H2SO4 → Na2SO4 + 2H2O
2NaOH + H2SO4 → Na2SO4 + 2H2O
Na2O + SO2 → Na2SO4
2Na + S + 2O2 → Na2SO4
4Na + 2S + 4O2 (g) → 2Na2SO4
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui persamaan termokimia;
C6H6(g) → 6C(s) + 3 H2(g) ∆H= - 49KJ, Pernyataan yang benar dari reaksi diatas adalah ...
Pembentukan 1 mol benzena (C6H6)memerlukan kalor sebesar 8,16 KJ
Pembentukan 1 mol benzena (C6H6)memerlukan kalor sebesar 49 KJ
Penguraian 1 mol benzena (C6H6) membebaskan kalor sebesar 49 KJ
Pembentukan 1 mol benzena (C6H6)membebaskan kalor sebesar 49 KJ
Penguraian 1 mol benzena (C6H6)memerlukan kalor sebesar 49 KJ
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 2 mol gas hidrogen jika direaksikan dengan 1 mol gas oksigen akan terbentuk uap air yang membutuhkan kalor sebesar 484 KJ. Persamaan termokimianya adalah ...
H2(g) + ½ O2(g) → H2O(g) ∆ H = 484 KJ
2H2(g) +O2(g)→ 2H2O(g) ∆H = -484 KJ
2H2(g)+O2(g) → 2H2O(g) ∆H = +484 KJ
2H2O(g) → 2H2(g)+ O2(g) ∆H=-484 KJ
H2O(g) → H2(g) + ½ O2(g) ∆ H=484 KJ
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