TERMOKIMIA
Quiz
•
Chemistry
•
1st - 4th Grade
•
Practice Problem
•
Medium
afri yuni
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan rekasi yang terjadi dalam kehidupan sehari hari berikut ini:
1. Pelarutan urea
2. Es mencair
3. Fotosintesis
4. Perkaratan
5. Pembakaran LPG
Reaksi endoterm ditunjukkan oleh nomor. . . .
A. 1, 2 dan 3
B. 1, 3 dan 4
C. 2, 3 dan 4
D. 2, 4 dan 5
E. 3, 4 dan 5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Perhatikan persamaan termokimia berikut.
Reaksi 1
CH4(g)+ 2O2 CO2 + 2H2O = -1.543KJ/mol
Reaksi 2
NH4Cl + NaOH NH3 + HCl +H2O = +234 Kj/mol
Pernyataan yang benar mengenai data tersebut adalah . . . .
A. Reaksi 1, system menyerap energy sehingga termasuk reaksi eksoterm
B. Reaksi 1, system menyerap energy sehingga termasuk reaksi endoterm
C. Reaksi 2, system menyerap energy sehingga termasuk reaksi endoterm
D. Reaksi 2, system melepaskan energy sehingga termasuk rekasi eksoterm
E. Reaksi 2, system melepaskan energy sehingga termasuk rekasi endoterm
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pada reaksi antara soda api dan HCl, jika kita pegang maka wadah reaksi akan terasa panas. Peristiwa tersebut termasuk contoh reaksi....
A.Eksoterm
B.Endoterm
C.Isoterm
D.Redoks
E. Entalpi
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sistem yang tidak memungkinkan terjadinya perpindahan energi dan massa disebut...
A.Sistem terisolasi
B.Sistem terbuka
C.Sistem tertutup
D.Sistem menyempit
E. Lingkungan
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Perhatikan diagram tingkat energi berikut :
Hubungan yang benar ditunjukkan oleh persamaan . . . . .
∆H1=∆H2 - ∆H3 + ∆H4
∆H1 = ∆H2 +∆H3 + ∆H4
∆H4 = ∆H1 - ∆H2 - ∆H3
∆H4 = ∆H2 + ∆H3 - ∆H1
∆H4 = ∆H2 -∆H3 - ∆H1
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui persamaan termokimia pembentukan Fe2O3 dan CO2:
2Fe(s) + 3/2O2(g) →Fe2O3(s) ΔH = - 822 kJ/mol
C(s) + 1/2O2(g) →CO(g) ΔH = -110 kJ/mol
Berapakah perubahan entalpi untuk reaksi berikut ini?
Fe2O3(s) + 3C(g) →2Fe(s) + 3CO(g) ΔH = .......... kJ/mol
Pilihan jawaban
+ 712
+492
-492
-712
+1
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui :
ΔHf0 CaH2 (s) = -189 kJ/mol
ΔHf0 H2O(l) = -285 kJ/mol
ΔHf0 Ca(OH)2 (s) = -197 kJ/mol
Perubahan entalpi dari reaksi :
CaH2 (s) + 2H2O(l) → Ca(OH)2 (s) + 2H2 (g) adalah….
-1.766 kJ
-474 kJ
-228 kJ
+228 kJ
+562 kJ
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