
Quiz Termokimia
Quiz
•
Chemistry
•
2nd Grade
•
Hard
LenSa -SMAN 14 Maros
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44 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu campuran pereaksi di dalam tabung reaksi meyebabkan tabung tersebut menjadi panas jika dipegang. Penyataan yang tepat mengenai hal tersebut adalah….
Entalpi pereaksi bertambah
Entalpi peraksi berkurang
Entalpi pereaksi dan hasil reaksi bertambah
Entalpi pereaksi lebih besar daripada entalpi hasil reaksi
Entalpi hasil reaksi lebih besar daripada entalpi pereaksi
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pernyataan yang benar tentang reaksi endoterm adalah….
Entalpi awal lebih besar daripada entalpi akhir dan ΔH > 0
Entalpi awal lebih kecil daripada entalpi akhir dan ΔH > 0
Entalpi awal lebih besar daripada entalpi akhir dan ΔH < 0
Entalpi awal lebih kecil daripada entalpi akhir dan ΔH < 0
Entalpi awal sama dengan entalpi akhir dan ΔH = 0
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebuah Kristal KNO3 dimasukkan ke dalam tabung reaksi kemudian ditetesi dengan air. Pada tabung reaksi terasa dingin. Reaksi ini dapat digolongkan….
Eksoterm, energy berpindah dari sistem ke lingkungan
Eksoterm, energy berpindah dari lingkungan kesistem
Endoterm, energy berpindah dari sistem ke lingkungan
Endoterm, energy berpindah dari lingkungan ke sistem
Endoterm, energy tidak berpindah
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perubahan entalpi dari reaksi manakah yang berikut ini dapat disebut dengan perubahan entalpi pembentukan ΔHfo Na2SO4 kristal….
2 NaOH (aq) + H2SO4 (aq) Na2SO4 (aq) + 2H2O (l)
2 NaOH (s) + H2SO4 (aq) Na2SO4 (k) + 2H2O (l)
Na2O (s) + SO2 (g) Na2SO4 (k)
2 Na (s) + 18 S8 (s) + 2O2 (g) Na2SO4 (k)
16 Na (s) + S8 (s) + 16 O2 (g) 8 Na2SO4 (k)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diantara persamaan termokimia di bawah ini yang merupakan perubahan entalpi penguraian adalah….
Mg (OH)2 (s) Mg (s) + O2 (g) + H2 (g) ΔHo = +925 kJ
C6H12O6 (s) + 6O2 (g) 6CO2 (g) + 6H2O (l) ΔHo = -2.820 kJ
CaO (s) + CO2 (g) CaCO3 (s) ΔHo = +1.207 kJ
Ca (s) + C (s) + O2 (g) CaCO3 (s) ΔHo = -1.207 kJ
2 CO2 (g) + 3H2O (l) C2H5O H (l) + 3O2 ΔHo = +1.380 kJ
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika diketahui: N2 (g) + 3H2 (g) 2NH3 (g) ΔH= -92 kJ Perubahan entalpi pada penguraian 1 mol gas NH3 menjadi unsur-unsurnya adalah….
-92 kJ
-46 kJ
+46 kJ
+92 kJ
+184 kJ
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika diketahui ΔHco C = -393,5 kJ mol -1 , berapa kalor yang terjadi pada pembakaran 1 kg arang, jika dianggap bahwa arang mengandung 48% karbon dan Ar C = 12?
15.740 kJ
15.470 kJ
16.740 kJ
16.470 kJ
17.740 kJ
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