
Termokimia Postes
2nd Grade
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6 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika ingin mengetahui reaktivitas HCl pada besi, anda masukkan logam besi ke dalam larutan HCl. Dalam hal ini disebut sistem adalah ....
larutan HCl
logam besi
pelarut air
HCl dan besi
udara sekitar
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Penulisan persamaan termokimia sesuai aturan yang berlaku adalah ....
H2(g) + O2(g) H2O(g) = - x kJ
H2(g) + 1/2O2(g) H2O(g) = - x kJ
2H2(g) + O2(g) 2H2O(g) = - x kJ
H2(g) + O2(g) H2O(g)
H2(g) + O2(g) + energi H2O(g)
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pembakaran 1 mol gas metana mengikuti persamaan termokimia berikut:
CH4(g) + 2O2(g) CO2(g) + 2H2O(l) = -294 kJ
Jumlah perubahan entalpi untuk reaksi kebalikannya adalah ....
-147 kJ
-294 kJ
-588 kJ
+144 kJ
+294 kJ
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diantara senyawa berikut yang merupakan entalpi penguraian standar adalah ....
NH4Cl(s) NH3(g) + HCl(g)
PCl5(g) PCl3(g) + Cl2(g)
H2O(g) H2(g) + 1/2O2(g)
SO3(g) SO2(g) + 1/2O2(g)
N2O4(g) 2NO2(g)
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika reaksi antara logam Barium dengan Asam Klorida encer di campurkan ked alam tabung reaksi yang tersumbat dengan rapat, gas Hidrogen di dalam sistem tidak dapat meninggalkan sistem. Akan tetapi perambatan kalor meninggalkan sistem tetap terjadi melalui dinding pada tabung reaksi. Pada percobaan ini termasuk ke dalam….
Sistem terbuka
Perubahan entalpi
Sistem tertutup
Perubahan energy dalam
Sistem terisolasi
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berdasarkan bagan di atas menunjukkan diagram perubahan entalpi reaksi:
C(s) + O2(g) CO2(g)
Dimana adalah entalpi pembentukan CO2 dan adalah entalpi pembentukan CO. Harga entalpi pembentukan gas CO2 dari gas CO adalah ....
-505 kJ
-283 kJ
-111 kJ
+283 kJ
+504 kJ
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