K.D. 3.4 PERSAMAAN TERMOKIMIA
Quiz
•
Chemistry
•
11th Grade
•
Hard
Mian Stephanie
Used 59+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1.Beberapa reaksi berikut ;
(1) Mg(s) + O2(g) MgO (s) DH = -p Kj
(2) N2(g) + 3H2(g) 2NH3(g) DH = -q Kj
(3) N2 (g) + H2(g) 2NO(g) DH = -r Kj
(4) H2(g) + S(s) H2S(g) DH =-s Kj
Yang merupakan entalpi pembentukan standar adalah...
1 dan 2
2 dan 3
3 dan 4
1 dan 3
1 dan 4
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Persamaan termokimia
(1) S(s) + O2(g) SO2(g) DH=-296,8 Kj
(2) NH3(g) N2(g) + 1 H2 (g) DH= +46,2 Kj
(3) NH4Cl(s) N2 (g) +2H2(g) + 1/2Cl2(g) DH=-317,1 Kj
(4) H2(g) + O2(g) H2O (g) DH=-242 Kj
Persamaan yang menunjukkan entalpi pembakaran standar ( H C) adalah...
1 dan 2
2 dan 3
1 dan 4
1 dan 3
2 dan 4
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui: pada proses pembentukan 5,85 gram NaCl dibebaskan energi sebesar 4250J. Maka persamaan termokimia untuk pembentukan 1 mol NaCl adalah (Mr NaCl = 58,5)….
Na(s) + ½ Cl2(g) → NaCl(s) ∆H = -411 kJ/mol
2Na(s) + Cl2(g) → 2NaCl(s) ∆H = -42,5 kJ/mol
Na(s) + ½ Cl2(g) → NaCl(s) ∆H = -42,5 kJ/mol
Na(s) + ½ Cl2(g) → NaCl(s) ∆H = +42,5 kJ/mol
2Na(s) + Cl2(g) → 2NaCl(s) ∆H = 1275 kJ/mol
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Kalor pembentukan NH4Cl pada keadaan standar adalah -350 kJ/mol. maka persamaan termokimianya adalah…
N2(g) + 4H2(g) + Cl2(g) → 2NH4Cl(s) ∆H = -700 kJ
N2(g) + 4H2(g) + Cl2(g) → 2NH4Cl(s) ∆H = -175 kJ
N2(g) + 4H2(g) + Cl2(g) → 2NH4Cl(s) ∆H = +37,5 kJ
N2(g) + 4H2(g) + Cl2(g) → 2NH4Cl(s) ∆H = +175 kJ
N2(g) + 4H2(g) + Cl2(g) → 2NH4Cl(s) ∆H = +700 kJ
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui DH0f NO(g)= -90 kJ/mol, Ar N=14,dan Ar O=16. Untuk pembentukan 5 g NO, maka...
diperlukan kalor sebesar 90 kJ
dibebaskan kalor sebesar 90 kJ
diperlukan kalor sebesar 5 kJ
dibebaskan kalor sebesar 5 kJ
dibebaskan kalor sebesar 15 kJ
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui
DH0f. H2O(l) =-285,8 kJ/mol, dan Ar H=1.
Pembakaran 1 g H2(g) membebaskan kalor sebesar...
571,6 kJ
142,9 kJ
57,16 kJ
285,8 kJ
28,58 kJ
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Persamaan termokimia yang menunjukkan perubahan entalpi pembentukan adalah…
1/2 N2(g) + 3/2 H2(g) → NH3 (g) ∆H = -46,2 kJ
2SO2(g) + O2(g) → 2SO3 (s) ∆H = -196,6 kJ
NH3(g) + HCl(aq) → NH4Cl(s) ∆H = -175 kJ
Ca2+(aq) + CO32-(aq) → CaCO3(s) ∆H = -1207 kJ
Na+(aq) + Cl-(aq) → NaCl(aq) ∆H = -788 kJ
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