Dilaboratorium larutan HCl direkasikan dengan larutan KOH dalam sebuah tabung reaksi. Sistem dalam percobaan tersebut yaitu . . . . .
Termokimia 10 Soal

Quiz
•
Chemistry
•
11th Grade
•
Medium
Q imya
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
HCl dan KOH
Tabung reaksi dan HCl
Tabung reaksi dan KOH
Laboratorium dan KOH
Laboratorium dan HCl
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pernyataan yang salah dari percobaan pada gambar adalah ....
Reaksi yang terjadi tergolong eksoterm
Kalor berangkat dari lingkungan ke sistem
Sistem yang terjadi pada gambar adalah sistem terbuka
Diagram energi dari percobaan tersebut arah panahnya turun
Terjadi kenaikan suhu sebesar 6oC
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reaksi pembakaran dari 2 mol methanol (CH3OH) menghasilkan kalor sebesar 1275 kJ. Tentukan persamaan termokimia dengan ΔHoc nya!
C(s) + ½O2(g) + 2H2(g) → CH3OH(l) ΔH = +637,5
CH3OH(l) + O2(g) → CO2(g) + H2O(l) ΔH = +637,5 kJ
CH3OH(l) → C(s) + ½O2(g) + 2H2(g) ΔH = -638,5
CH3OH(l) + O2(g) → CO2(g) + H2O(l) ΔH = -1275 kJ
CH3OH(l) + O2(g) → CO2(g) + H2O(l) ΔH = -637,5 kJ
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Entalpi pembentukan NH4Cl(s) adalah +314,4 kJ/mol. Persamaan reaksi yang tepat mewakili pembentukan senyawa tersebut adalah ....
½N2 + 2H2 + ½Cl2 → NH4Cl ΔH = +314,4 kJ/mol
2N + 4H + Cl → NH4Cl ΔH = +314,4 kJ/mol
N2 + 4H2 + Cl2 → 2NH4Cl ΔH = +314,4 kJ/mol
NH3 + HCl → NH4Cl ΔH = +314,4 kJ/mol
N2 + 4H2 + Cl2 → 2NH4Cl ΔH = +314,4 kJ/mol
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nilai x pada diagram tersebut adalah …
-197 kJ
+197 kJ
-1.383 kJ
+1.383 kJ
-1.970 kJ
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Di dalam suatu calorimeter bom direaksikan 0,16 gram gas metana (CH4) Mr CH4 = 16 dengan oksigen berlebihan, sehingga terjadi reaksi: CH4(g) + 2O2(g) CO2(g) + 2H2O(g).
Ternyata terjadi kenaikan suhu 3 oC. Diketahui kapasitas calorimeter adalah 958 J/oC, massa air 1000 gram dan kalor jenis air 4,18 J/g oC. Tentukan perubahan entalpi molar (ΔH) pembakaran tersebut!
+770,7 kJ
-770,7 kJ
-1541,4 kJ
+15414 kJ
+1027600 kJ
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2Ca(s) + O2(g) → 2CaO(s) ΔH = +1.273 kJ
CO2(g) → C(s) + O2(g) ΔH = -393 kJ
CaO(s) + CO2(g) → CaCO3(s) ΔH = +176 kJ
Perubahan entalpi reaksi:
2Ca(s) + 2C(s) + 3O2(g) → 2CaCO3(s) adalah….
+1524 kJ
+2411 kJ
+2409 kJ
+2415 kJ
+1205,5 kJ
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