Sebuah Kristal KNO3 dimasukkan ke dalam tabung reaksi kemudian ditetesi dengan air. Pada tabung reaksi terasa dingin. Reaksi ini dapat digolongkan….
Penilaian Harian Termokimia XI IPA2

Quiz
•
Chemistry
•
11th Grade
•
Medium
sri supatmi
Used 10+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Eksoterm, energi berpindah dari sistem ke lingkungan
Eksoterm, energi berpindah dari lingkungan ke sistem
Wndoterm, energi berpindah dari lingkungan ke sistem
Endoterm, energi berpindah dari sistem ke lingkungan
Endoterm, energi tidak berpindah
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perubahan entalpi dari reaksi manakah yang berikut ini dapat disebut dengan perubahan entalpi pembentukan ΔHf° Na2SO4 kristal….
2NaOH(aq) + H2SO4(aq) → Na2SO3(aq) + 2H2O(l)
2NaOH(s) + H2SO4(aq) → Na2SO3(s) + 2H2O(l)
Na2O(s) + SO2(g) → Na2SO4(g)
2Na(s) + 1/8S8(s) + 2O2(g) → Na2SO4(s)
16Na(s) + S8(s) + 16O2(g) → 8Na2SO4(s)
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui ΔHc°C = -393,5 kJ mol‾¹ , berapa perubahan entalpi pada pembakaran 1 kg arang, jika dianggap bahwa arang mengandung 48% karbon dan Ar C = 12?
-15.740 kJ
-15.470 kJ
+15.740 kJ
+15.470
-470
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada reaksi tersebut sistem melepas kalor sebesar 150 kj dan menghasilkan gas yang akan menyebabkan terjadinya perubahan volume, sistem ini juga melakukan kerja sebesar 45 kj. Perubahan energy dalam dalam proses tersebut adalah….
-195 kJ
+185 kJ
-162,8 kJ
+195 kJ
+162,7 kJ
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Jika gas karbon di reaksikan dan gas oksigen akan di hasilkan gas Karbondioksida. Bila reaksi tersebut melepaskan kalor sebanyak 150 kj, maka diagram energi yang benar di bawah ini adalah……
C + O2 → CO2 H= -150 kJ
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui :
S(s) + O2(g) → SO2(g) ∆H = -300 kJ
2SO2(g) + O2(g) → 2SO3(g) ∆H = -190 kJ
maka ∆H untuk reaksi :
2S(s) + 3O2(g) → 2SO3(g) adalah ....
+790 kJ
+395 kJ
-110 kJ
-395 kJ
-790 kJ
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui :
H2O(l) → H2O(s) ∆H = -1,4 kkal
H2O(l) → H2(g) + 1/2O2(g) ∆H = +68,3 kkal
H2(g) + 1/2O2(g) → H2O(g) ∆H = -57,8 kkal
Perubahan entalpi ketika es menguap adalah ....
+11,9 kkal
-11,9 kkal
+9,1 kkal
-9,1 kkal
+124,7 kkal
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