
TERMOKIMIA
Authored by Maria Yekiana Mulyahati
Chemistry
11th Grade
Used 262+ times

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13 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika 4 mol karbon direaksikan dengan 4 mol gas hidrogen terbentuk 2 mol gas etena (C2H4) dan kalor yang dibutuhkan 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 = -52,3 kJ
2C(s) + 2H2(g) --> C2H4(g) ∆H = +52,3 kJ
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perubahan entalpi pembentukan ( ∆Hf ) Kristal Na2SO4 ditunjukkan oleh reaksi ….
2NaOH(aq) + H2SO4(aq) --> Na2SO4(aq) + 2H2O(l)
2NaOH(aq) + H2SO4(aq) --> Na2SO4(kristal) + 2H2O(l)
Na2O(s) + SO2(g) --> Na2SO4(Kristal)
2Na(s) + 1/8 S8(s) +2O2(g) --> Na2SO4(Kristal)
16Na(s) + S8(s) + 16O2(g) --> 8Na2SO4(Kristal)
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kalor yang dilepas atau dibutuhkan apabila 1 mol zat dibakar disebut ….
kalor lebur
kalor laten
kalor pembakaran
kalor peruraian
kalor netralisasi
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui : N2(g) + 3H2(g) --> 2NH3(g) ∆H = -92 kJ.
Perubahan entalpi pada peruraian 1 mol gas NH3 menjadi unsur-unsurnya adalah ….
- 92 kJ
- 46 kJ
+ 46 kJ
+ 92 kJ
+ 184 kJ
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui:
2NO(g) + O2(g) --> N2O4(g) ∆H = a kJ
NO(g) + ½ O2(g) --> NO2(g) ∆H = b kJ
Besarnya ∆H untuk reaksi:
2NO2(g) --> N2O4(g) adalah ….
(a + b) kJ
(a + 2b) kJ
(-a + 2b)
(2a + b) kJ
(a - 2b) kJ
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Dari siklus tersebut, AHf0 CH4 adalah ….
-571,6 kJ/mol
-393 kJ/mol
+571,6 kJ/mol
-74,8 kJ/mol
+74,8 kJ/mol
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berdasarkan diagram berikut, harga ∆H3 adalah
∆H1 + ∆H2 - ∆H4
∆H1 - ∆H2 - ∆H4
∆H2 + ∆H4 - ∆H1
∆H1 + ∆H4 - ∆H2
∆H1 - ∆H2 + ∆H4
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