
Quiz Kimian
Quiz
•
Chemistry
•
University
•
Practice Problem
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu reaksi tergolong endoterm jika….
Wadah reaksi menjadi panas
Memancarkan cahaya
Produk mempunyai entalpi lebih besar daripada pereaksi
Terjadi pembentukan ikatan kimia
Kalor mengalir dari system ke lingkungan
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada proses eksoterm…
Entalpi sistem bertambah dan perubahan entalpi positif
Entalpi sistem berkurang dan perubahan entalpi negatif
Entalpi sistem berkurang dan perubahan entalpi positif
Entalpi sistem bertambah dan perubahan entalpi negatif
Entalpi lingkungan berkurang dan perubahan entalpi negatif
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diantara persamaan termokimia berikut yang perubahan entalpinya dapat dikatakan sebagai entalpi pembentukan adalah….
2H(g) + O(g) → H2O(l) ∆H = - 926 kj
H+(aq) + OH-(aq) → H2O(l) ∆H = - 926 kj
C2(s) + 2H2(g) → C2H4(g) ∆H = + 54 kj
2H2(s) + O2(g) → 2 H2O(l) ∆H = - 484 kj
2C (s) + 3H2(g) + ½ O2(g) → C2H6O(g) ∆H = - 277 kj
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui ∆Hf0 NH3(g) sama dengan -46 kj mol-1. Maka perubahan entalpi reaksi berikut
2NH3(g) → N2(g) + 3H2(g) adalah….
– 46 kj
+ 46 kj
– 92 kj
+ 92 kj
+ 138 kj
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui persamaan termokimia
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H¬¬2O(l) ∆H = -24 kj
Pada pembakaran sempurna 11,2 liter (STP) ….
Membebaskan 6 kj
Memerlukan 6 kj
Diserap 12 kj
Dibebaskan 12 kj
Diperlukan 12 kj
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
CO(g) + ½ O¬¬2(g) → CO2(g) ∆H = x kj, x adalah entalpi…
Pembentukan CO
Penguraian CO2
Pembakaran CO
Pembakaran CO2
Pembentukan CO2
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui
2NO + O2 → N2O4 ∆H = a kj
NO + ½ O2 → NO2 ∆H = b kj
Besarnya ∆H untuk reaksi 2NO2 → N2O4 adalah….
(a +b) kj
(a + 2b) kj
(-a + b) kj
(a – 2b) kj
(2a + b) kj
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