
hukum hess
Authored by deliana deliana
Chemistry
2nd Grade
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan reaksi berikut.
1) 2S(g) + O2(g) -> 2SO2(g)
2) H2(g) + I2(g) -> 2HI(g)
3) 2NH3(g) -> N2(g) + 3H2(g)
Reaksi (1), (2), dan (3) berturut-turut merupakan reaksi ….
Pembakaran, peruraian, dan pembentukan
Penetralan, peruraian, dan pembakaran
Pembakaran, pembentukan, dan peruraian
Pembentukan, pembakaran, dan peruraian
2.
MULTIPLE CHOICE QUESTION
30 sec • 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
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Gunakan hukum Hess untuk menentukan ΔH reaksi:
C(s) + 12O2(g) + 2H2(g)→ CH3OH(g)
Diketahui:
C(s) + 12 O2(g)→ CO(g) ΔH°1 = –111 kJ
CO(g) + 2H2(g)→ CH3OH(l) ΔH°2 = –128 kJ
-132 kJ
-239 kJ
-264 kJ
-458 kJ
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Diketahui reaksi:
S + O2 → SO2 ΔH = − 71 kkal
2SO2 + O2 → 2SO3 (g) ΔH = − 47 kkal
Maka ΔH untuk reaksi S + 3/2O2 → SO3 adalah..
a. − 47,25 kkal
b. − 94,50 kkal
c. +94,40 kkal
d. −189,00 kka
e. +189,00 kkal
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
maka untuk persamaan reaksi ....
-110,5 Kj
-221 Kj
-55,25 Kj
+55,25 Kj
+110,5 Kj
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
maka untuk persamaan reaksi ....
-110,5 Kj
-221 Kj
-55,25 Kj
+55,25 Kj
+110,5 Kj
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
maka untuk persamaan reaksi ....
-110,5 Kj
-221 Kj
-55,25 Kj
+55,25 Kj
+110,5 Kj
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