ULANGAN TERMOKIMIA 2019

ULANGAN TERMOKIMIA 2019

Professional Development

15 Qs

quiz-placeholder

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ULANGAN TERMOKIMIA 2019

ULANGAN TERMOKIMIA 2019

Assessment

Quiz

Chemistry

Professional Development

Hard

Created by

Hamzah Hamzah

Used 28+ times

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15 questions

Show all answers

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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