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Authored by Triyanda Gunawan
Chemistry
University
NGSS covered
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8 questions
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1.
OPEN ENDED QUESTION
3 mins • Ungraded
Bagaiman JJ Thompson menemukan Elektron
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2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ke dalam tabung reaksi yang berisi air dilarutkan urea padat. Ternyata jika dipegang pada tabung reaksi terasa dingin. Yang dimaksud dengan sistem pada peristiwa ini adalah .....
Urea
Air
Urea dan Air
Urea, air dan tabung reaksi
Tangan dan tabung reaksi
Tags
NGSS.HS-PS3-4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pernyataan di bawah ini yang termasuk ke dalam reaksi Endoterm adalah
Besi berkarat
Pembuatan es batu dan air
Air mengalir
Ledakan bom
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada pembakaran 64 gram metanol (Mr=32) dalam kalorimeter menyebabkan suhu air meningkat 200C. Jika kalorimeter berisi 5 liter air (ρ=1kg/L) dan kalor jenis air = 4,2 J.g-1.0C-1. Jika kapasitas kalorimeter = 2.700 J.0C-1
maka entalpi pembakaran metanol adalah....
-48 kJ/mol
-64 kJ/mol
-72 kJ/mol
-96 kJ/mol
-102 kJ/mol
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui :
ΔHof C2H6(g) = -84,7 kJ/mol
ΔHof H2O (l) = -285,8 kJ/mol, dan
ΔHof CO2(g) = -393,6 kJ/mol
Berdasarkan data entalpi pembentukan standar tersebut, besar perubahan entalpi pembakaran gas etana adalah,.....
-84,7 kJ/mol
-285,8 kJ/mol
-393,5 kJ/mol
-1559,7 kJ/mol
-1644,4 kJ/mol
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
+ 790 kJ
+ 395 kJ
– 395 kJ
– 396 kJ
– 790 kJ
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui :
CS2 + 3O2 → CO2 + 2SO2 ΔH = -1110 kJ
CO2 → C + O2 ΔH = +394kJ
SO2 → S + O2 ΔH = +297 kJ
Maka kalor pembentukan CS2 adalah ...
+122 kJ
-122 kJ
+419 kJ
-419 kJ
+906 kJ
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