
ULANGAN TERMOKIMIA 2019
Quiz
•
Chemistry
•
Professional Development
•
Hard
Hamzah Hamzah
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika entalpi pembentukan CO2 = -393 kj/mol, H2O = -242 kj/mol, C3H8 = 104 kj/mol, besarnya energi yang dibebaskan pada pembakaran 1mol C3H8 dengan persamaan reaksi sbb :
C3H8 + 5O2 → 3CO2 + H2O
-2.043 kj/mol
+2.043 kj/mol
+107 kj/mol
-107 kj/mol
-224 kj/mol
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Entalpi pembakaran suatu bahan bakar besarnya -5.460 kj/mol. jika 5,7 gram bahan bakar ( Mr = 114 ) tersebut dibakar maka entalpi pembakaran yang dihasikan adalah....
5.460 X 114 / 5,7 kj
5,7/ 114 X 5.460 kj
5.460 X 114 kj
5.460 X 5,7 kj
-5.460/114 X 5,7 kj
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui :
∆Hf H2O = -285,5 kj/mol
∆Hf CO2 = -393,5 kj/mol
∆Hf C3H8 = -103,0 kj/mol
perubahan entalpi dari reaksi :
C3H8 + 5O2 → 3CO2 + 4H2O
adalah....
-1180,5 kj
+1180,5 kj
+2219,5 kj
-2219,5 kj
+ 2819,5kj
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Reaksi :
C6H12O6 + 6O2 → 6CO2 + 6H2O ∆H = -2.820 kj
C2H5OH + 3O2 → 2CO2 + 3H2O ∆H = -1.380 kj
Perubahan entalpi fermantasi glukosa;
C6H12O6 → 2C2H5OH + 2CO2 adalah.........
+60 kj
-60 kj
+1440 kj
-1440 kj
+ 160 kj
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui perubahan entalpi pembentukan H2S, SO2 dan H2O berturut - turut -20 kj/mol,-298 kj/mol, dan -286 kj/mol. harga perubahan entalpi reaksi ;
H2S + 11/2 O2 → SO2 + H2O adalah.......
-446 kj
-564 kj
-604 kj
-645
+564 kj
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui energi ikatan rata - rata :
C-H = 413 kj/mol, C-C = 348 kj/mol, H-H = 436 kj/mol, C=C = 614 kj/mol, besarnya perubahan entalpi reaksi :
C2H4 + H2 → C2H6 adalah......
-826 kj/mol
-738 kj/mol
-560 kj/mol
-124 kj/mol
+124 kj/mol
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui energi ikatan dari :
O-H = 464 kj, O=O = 500 kj, H-H = 436 kj dengan reaksi sbb:
H2O → H2 + 1/2 O2
kalor yang diperlukan untuk menguraikan 9 gram air ( Mr = 18 ) adalah.....
8 kj
121 kj
222 kj
242 kj
-121 kj
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