H2(g) + Br2(g) → 2HBr(g) ∆H = -72 kJ, maka untuk dapat menguraikan 11,2 dm3 (pada STP) gas HBr menjadi H2 dan Br2 diperlukan kalor sebanyak …. kJ.
Soal kimi farmasi kls XI UTS genap

Quiz
•
Physics
•
9th - 12th Grade
•
Hard
SMK Purwajaya
Used 1+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
72
36
18
9
16
2.
MULTIPLE CHOICE QUESTION
1 min • 4 pts
C(intan) + O2 → CO2(g) ∆H = -394,1 kJ
C(grafit) + O2 → CO2(g) ∆H = -396,0 kJ
Maka ∆H untuk reaksi C(grafit) → C(intan) adalah …. kJ.
-790
-1,9
+1,9
-01,9
0,9
3.
MULTIPLE CHOICE QUESTION
1 min • 4 pts
Diketahui reaksi:
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) ∆H = -2600 kJ
Jika entalpi pembentukan CO2 dan H2O masing-masing -393,5 kJ/mol dan -2866 kJ/mol, maka entalpi pembentukan C2H2 adalah …. kJ/mol
-452
-227
+217
+727
+227
4.
MULTIPLE CHOICE QUESTION
1 min • 4 pts
Dalam calorimeter terdapat zat yang bereaksi secara eksotermik dan ternyata 0,5 kg air yang mengelilinginya sebagai pelarut mengalami kenaikan temperature sebesar 3° Kalor jenis air = 4,2 J/gram K. Kalor reaksi zat yang dilepaskan oleh reaksi itu adalah..
5796 kJ
579,6 kJ
578,6 kJ
577,6 kJ
5.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Diketahui:
∆Hf CO2 = -344 kJ/mol
∆Hf H2O = -286 kJ/mol
∆Hf CH3OH = -284 kJ/mol
Perubahan entalpi pada reaksi
CH3OH + O2 → CO2 + H2O (belum setara)
-914
-1264
-632
-346
-1265
6.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Suatu campuran pereaksi di dalam tabung reaksi meyebabkan tabung tersebut menjadi panas jika dipegang. Penyataan yang tepat mengenai hal tersebut adalah….
Entalpi pereaksi dan hasil reaksi bertambah
Entalpi pereaksi lebih besar daripada entalpi hasil reaksi
Entalpi peraksi berkurang
Entalpi pereaksi bertambah
7.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Pernyataan yang benar tentang reaksi endoterm adalah….
Entalpi awal lebih kecil daripada entalpi akhir dan ΔH < 0
Entalpi awal lebih besar daripada entalpi akhir dan ΔH < 0
Entalpi awal lebih kecil daripada entalpi akhir dan ΔH > 0
Entalpi awal lebih besar daripada entalpi akhir dan ΔH > 0
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