energi ikatan termokimia
Quiz
•
Chemistry
•
11th Grade
•
Hard
Kicky Wardani
Used 256+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
+94 kJ
+81 kJ
-81 kJ
-94 kJ
-208 kJ
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
1.173,5 kJ
735,5 kJ
391 kJ
245 kJ
130 kJ
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Diketahui
N2(g) + 3H2(g) --> 2NH3(g) H= - 107 kJ/mol
jika energi ikatan :
N N : 941 kJ/mol
H – H : 436 kJ/mol
maka energi ikatan rata-rata N-H dalam NH3 adalah … .
393 kJ/mol
642 kJ/mol
782 kJ/mol
2249 kJ/mol
2346 kJ/mol
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Diketahui energi ikat:
H – I = 299 kJ/mol
H – H = 436 kJ/mol
I – I = 151 kJ/mol
maka kalor yang diperkukan untuk menguraikan 256 gram HI (Ar H = 1; I = 127) menjadi unsur-unsurnya adalah … .
5,5, kj
11,0 kj
22,0 kj
44,0 kj
88,0 kj
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Diketahui energi ikatan rata-rata untuk
C – C : 348 kJ/mol C – Cl : 328 kJ/mol
C = C : 641 kJ/mol H – Cl : 431 kJ/mol
C – H : 413 kJ/mol
Maka perubahan entalpi reaksi
H2C = CH2 + HCl H3C – CH2 – Cl adalah … .
– 17 kJ
+ 17 kJ
– 44 kJ
+ 44 kJ
+ 47 kJ
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Dari data :
2 H2(g) + O2 (g) → 2 H2O(l) ∆H=-571 kJ
2 Ca(s) + O2 (g) → 2 CaO(s) ∆H = -1269 kJ
CaO(s) + H2O (l) → Ca(OH)2 (s) ∆H=-64 kJ
Harga ∆H0f kalsium hidroksida adalah ....
-984 kJ/mol
-1161 kJ/mol
-856 kJ/mol
-1904 kJ/mol
-1966 kJ/mol
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Padatan kalsium oksida direaksikan dengan air membentuk senyawa kalsium hidroksida berbentuk padatan. Dalam reaksi tersebut terjadi pelepasan kalor sebesar 64 kJ. Persamaan termokimia yang benar untuk reaksi tersebut adalah......
CaO(s) + H2O (l) → Ca(OH)2(s) ∆H=+64 kJ
CaO(s) + H2O (l) → Ca(OH)2(s) ∆H=-64 kJ
CaO(s) + H2O (l) → Ca(OH)2(aq) ∆H=-64 kJ
CaO(s) + H2O (l) → Ca(OH)2(aq) ∆H=+64 kJ
CaO(s) + 2 H2O (l) → Ca(OH)2(s) ∆H=-64 kJ
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