Tugas Termokimia#1
Quiz
•
Chemistry
•
1st - 3rd Grade
•
Practice Problem
•
Hard
Ibrahim Wahyudi
Used 48+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Persamaan reaksi berikut yang menunjukkan definisi perubahan entalpi pembentukan karbon monoksida adalah … .
C(s) + O(s) --> CO(g)
C(s) + O(s) --> CO(g)
C(s) + CO2(s) --> 2CO(g)
C(s) + 1/2 O2(g) --> CO(g)
C(s) + CO2(s) --> 2CO(g)
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada proses endoterm … .
kalor berpindah dari sistem ke lingkungan dan DH<0
kalor berpindah dari sistem ke ingkungan dan DH>0
kalor berpindah dari lingkungan ke sistem dan DH<0
kalor berpindah dari lingkungan ke sistem dan DH>0
tidak terjadi perpindahan kalor dan DH=0
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Entalpi pembentukan MgSO4 (s) = -1278 kJ mol-1 maka persamaan termokimia pembentukan MgSO4 yang benar adalah … .
MgO(s) + SO3(g) --> MgSO4(s) DH= - 1278 kJ
Mg(s) + S(s) + 2O2(g) --> MgSO4(s) DH= - 1278 kJ
2Mg(s)+2S(s)+4O2(g) --> 2MgSO4(s)DH=-2556 kJ
Mg2+ (aq)+ SO42-(aq) --> MgSO4(s) DH= - 1278 kJ
MgS(s) + 2O2(g) --> MgSO4(s) DH= - 1278 KJ
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dari diagram berikut :
– 349,8 kJ/mol
+349,8 kJ/mol
+195,4 kJ/mol
-174,9 kJ/mol
+174,9 kJ/mol
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui :
(-a – b) kj/mol
(a – b) kj/mol
(a + b) kj/mol
1/2(a - 2b) kj/mol
(a + 2b) kj/mol
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perubahan entalpi standar pembentukan gas etena dan gas etana berturut-turut adalah 52 kj/mol dan –85 kj/mol, maka perubahan entalpi untuk reaksi :
C2H4(g) + H2(g) --> C2H6(g) adalah … .
–33 kj/mol
+33 kj/mol
–137 kj/mol
+137 kj/mol
–274 kj/mol
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui :
Hf. CO2(g) = -394 kJ/mol
Hf. H2O(g) = -242 kJ/mol
Hf. C2H6(g) = -85 kJ/mol
maka perubahan entalpi pembakaran C2H6(g) adalah … .
–714,50 kJ/mol
+714,50 kJ/mol
-1425,50 kJ/mol
+1429,00 kJ/mol
– 2858,00 kJ/mol
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