
TERMOKIMIA
Authored by Emmi Dwiastuti
11th Grade
Used 8+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
perhatikan reaksi berikut ini
H2 + 1/2 O2 → H20 ∆Hf° = -285,85 KJ
pernyataan yang benar dari reaksi tersebut adalah....
pada pembentukan 1 mol air dari unsur-unsurnya dibebaskan energi sebesar 285,85 Kj
pada pembentukan 1 mol air dari unsur-unsurnya dibutuhkan energi sebesar 285,85 KJ
pada pembentukan 1 mol air dari unsur-unsurnya dibutuhkan energi sebesar -285,85 KJ
pada pembentukan 1 mol air dari unsur-unsurnya dibebaskan energi sebesar -285,85 Kj
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui reaksi: 2HCl(g) --> H2(g) + Cl2(g) DH = +184 kJ, maka perubahan entalpi pada pembentukan 1 mol HCl adalah …
+ 230 kJ
+ 184 kJ
+ 92 kJ
– 92 kJ
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui:
2H2 + O2 --> 2H2O DH = – 571 kJ/mol
2Ca + O2 --> 2CaO DH = – 1269 kJ/mol
CaO + H2O --> Ca(OH)2 DH = – 64 kJ/mol
Besar DH untuk reaksi penguraian Ca(OH)2 adalah …
+ 984 kJ/mol
+ 1161 kJ/mol
+ 1452 kJ/mol
+ 1966 kJ/mol
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui :
ΔHof C2H6(g) = -84,7 kJ/mol
ΔHof H2O (l) = -285,8 kJ/mol, dan
ΔHof CO2(g) = -393,6 kJ/mol
Berdasarkan data entalpi pembentukan standar tersebut, besar perubahan entalpi pembakaran gas etana adalah,.....
-84,7 kJ/mol
-285,8 kJ/mol
-393,5 kJ/mol
-1559,7 kJ/mol
-1644,4 kJ/mol
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Data energi ikatan rata rata :
C=C = 609 kJ/mol
C-Cl = 326 kJ/mol
C-H = 412 kJ/mol
C-C = 345 kJ/mol
H-Cl = 426 kJ/mol
Besarnya entalpi reaksi
CH2=CH2 + HCl → CH3CH2Cl
adalah,......
-312 kJ/mol
-48 kJ/mol
48 kJ/mol
100 kJ/mol
312 kJ/mol
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebanyak 25 ml (25 gram) larutan NH4OH 1 M suhunya 20oC di campurkan dengan 25 ml (25 gram) larutan HNO2 1 M suhunya 20oC dalam calorimeter gelas plastic, ternyata suhu campuran naik menjadi 27,5 oC jika kalor jenis larutan di anggap sama dengan kalor jenis air yaitu 4,18 Jg-1c-1 . Di bawah ini perubahan entalpi reaksi yang terjadi……
59,8 KJ/mol
62,7 KJ/mol
-71,8 KJ/mol
-62,7 KJ/mol
-59,8 KJ/mol
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