REMEDIAL THERMOKIMIA

Quiz
•
Chemistry
•
11th Grade
•
Medium
Eva Nillasari
Used 52+ times
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui:
N2 (g) + 3 H2 (g) ⇌ 2 NH3 𝛥H = – 92 kJ Besarnya perubahan entalpi penguraian standar gas NH3 adalah …
– 92 kJ/mol
– 46 kJ/mol
+ 46 kJ/mol
+ 92 kJ/mol
+ 184 kJ/mol
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui perubahan entalpi pembentukan standar Na2SO4 (s) sebesar – 1.267 kJ. Persamaan termokimia yang tepat untuk pernyataan di atas adalah ….
Na2SO4 (s) → 2 Na (s) + S (s) + 2 O2 (g) ΔH = – 1.267 kJ
Na2SO4 (s) → 2 Na+ (aq) + SO4 – 2 (aq) ΔH = – 1.267 kJ
2 Na+ (aq) + SO4 – 2 (aq) → Na2SO4 (s) ΔH = – 1.267 kJ
2 Na (s) + SO2 (g) + O2 (g) → Na2SO4 (s) ΔH = – 1.267 kJ
2 Na (s) + S (s) + 2 O2 (g) → Na2SO4 (s) ΔH = – 1.267 kJ
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui :
Δ Hof C2H6 (g) = – 84,7 kJ/mol
Δ H2O (g) = – 242 kJ/mol
Δ Hof CO2 (g) = – 394 kJ/mol
Bila C2H6 dibakar sempurna menurut reaksi :
2C2H6 (g) + 7O2 (g) → 4CO2 (g) + 6H2O (g)
Besarnya perubahan entalpi dari reaksi tersebut adalah ....
– 1.4520 kJ
– 1.5760 kJ
– 2.858,6 kJ
– 3.128,0
– 3.197,4 kJ
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berdasar siklus Hess di atas, besarnya perubahan entalpi pembentukan standar atau ΔH𝑓 𝑂 SO3 (g) adalah .... kJ/mol
– 859,50
– 486,50
– 429,75
+ 486,50
+ 859,50
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui data energi ikat rata-rata sebagai berikut :
C – H = 415 kJ / mol
C = C = 607 kJ / mol
H – H = 436 kJ / mol
C – C = 348 kJ / mol
Besarnya perubahan entalpi pada reaksi :
CH2 = CH2 + H2 ⟶ CH3 – CH3
tersebut adalah .... kJ.
– 235
– 180
– 135
+ 135
+ 180
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