Termokimia Entalpi
Quiz
•
Chemistry
•
11th Grade
•
Hard
Tias Mutiara
Used 7+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
Berikut ini yang merupakan reaksi pembentukan standar adalah ....
Ca(s) + O(g) + H(g) ------> Ca(OH)2 (s) ΔH = -a kal
Ca2+(s) + O2 (g) + H2(g) ------> Ca(OH)2 (s) ΔH = -a kal
Ca(s) + O2 (g) + H2(g) ------> Ca(OH)2 (s) ΔH = -a kal
Ca(s) + 2O2(g) + 2H(g) ------> Ca(OH)2 (s) ΔH = -a kal
2Ca(s) + O2(g) + H2(g) ------> 2Ca(OH)2 (s) ΔH = -a kal
2.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
Jika kalor jenis air adalah 4,18 J.g-1.0C maka untuk memanaskan 50 gram air dari suhu 250C menjadi 750C memerlukan kalor sebesar....
8,250 kJ
9,725 kJ
10,450 kJ
11,725 kJ
12,45 kJ
3.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
Pada pembakaran 64 gram metanol (Mr=32) dalam kalorimeter menyebabkan suhu air meningkat 200C. Jika kalorimeter berisi 5 liter air (ρ=1kg/L) dan kalor jenis air = 4,2 J.g-1.0C-1. Jika kapasitas kalorimeter = 2.700 J.0C-1
maka entalpi pembakaran metanol adalah....
-48 kJ/mol
-64 kJ/mol
-72 kJ/mol
-96 kJ/mol
-102 kJ/mol
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui :
C(s) + O2 (g) → CO2 (g) ΔH = -393 kJ
2CO(s) + O2 (g) → 2CO2 (g) ΔH = -568 kJ
Berdasarkan data tersebut ΔHf0 CO adalah....
-786 kJ
-568 kJ
-393 kJ
-284 kJ
-109 kJ
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Berikut ini pernyataan yang benar tentang reaksi endoterm adalah....
entalpi awal lebih besar dari entalpi akhir dan ΔH > 0
entalpi awal lebih kecil dari entalpi akhir dan ΔH > 0
entalpi awal lebih besar dari entalpi akhir dan ΔH < 0
entalpi awal lebih kecil dari entalpi akhir dan ΔH < 0
entalpi awal sama dengan entalpi akhir dan ΔH = 0
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika diketahui reaksi berikut :
N2 (g) + 3H2 (g) → 2NH3 (g) ΔH= -92 kJ
Berdasarkan reaksi tersebut harga entalpi penguraian (ΔHd) NH3 adalah....
+184 kJ
+92 kJ
+46 kJ
-92 kJ
-46 kJ
7.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
Diketahui:
ΔHf0 H2O(g) = -242 kJ/mol
ΔHf0 CO2O(g) = -394 kJ/mol
ΔHf0 CH4(g) = -84 kJ/mol
Perubahan entalpi reaksi berikut
CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O(g)
adalah....
-720 kJ
-887 kJ
-84 kJ
-397 kJ
-794 kJ
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