jenis jenis entalpi
Quiz
•
Chemistry
•
University
•
Practice Problem
•
Hard
Rahmah al syukria
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Perhatikan persamaan termokimia berikut:
2Fe(s) +1½ O2(g) Fe2O3(s) ∆H= –A kJ
Perubahan entalpi tersebut dapat juga disebut
Kalor pembentukan standar Fe
Kalor pembentukan standar O
Kalor penguraian standar Fe2O3
Kalor pembentukan standar Fe2O3
Kalor pembakaran standar Fe2O3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. Entalpi pembentukan CaCO3(s) = - 1207 kJ/mol. Data ini dapat diungkapkan dengan persamaan termokimia sebagai berikut….
CaO(g) + CO2(g) CaCO3(s) = - 1207 kJ
Ca2+(g) + CO32-(g) CaCO3(s = - 1207 kJ
Ca2+(g) + CO3 2-(g) CaCO3(s) = - 1207 kJ
Ca(s) + C(s)+ 3/2O2(g) CaCO3(s)= -1207 kJ
Ca(g) + C(s) + 3O(g) CaCO3(s) = - 1207 kJ
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Persamaan termokimia yang benar untuk pembentukan 1 mol H2O dari unsur – unsur nya adalah . . .
2H2 + O2 2H2O
H2 + 2O2 H2O
2H2O 2H2 + O2
½ H2 + O2 H2O
H2 + ½ O2 H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Perhatikan reaksi berikut :
NO(g) ½N2(g) +½ O2(g) ∆H= +B kJ
Persamaan termokimia pada reaksi di atas menunjukan persamaan entalpi .....
Pembakaran standar
penguraian standar
pelarutan standar
pembentukan standar
netralisasi standar
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
1. Reaksi pembentukan 1 mol C2H4 dari karbon dan gas hidrogen membutuhkan kalor sebanyak 54 kJmol-1. Reaksi pembentukan 14 gram C2H4 membutuhkan kalor …. (Ar C= 12, H=1)
27 kj
54 kj
81 kj
106 kj
133 kj
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Pada reaksi pembakaran perubahan entalpi bernilai negatif karena . . . .
Reaksi endoterm karena membebaskan kalor
Reaksi endoterm karena membebaskan kalor
Reaksi eksoterm karena menyerap kalor
Reaksi eksoterm karena membebaskan kalor
Karena pada keadaan standar (STP)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. perubahan kalor yang dilepaskan ketika 1 mol air terbentuk dari reaksi asam oleh basa atau sebaliknya disebut . . . .
entalpi pembentukan standar (∆H0f)
entalpi penguraian standar (∆H0d)
entalpi pembakaran standar (∆H0c)
entalpi netralisasi standar (∆H0n)
entalpi pelarutan standar (∆H0s)
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