
TERMOKIMIA
Authored by winarni parhan
Chemistry
2nd Grade
Used 4+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 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
3 mins • 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
3 mins • 1 pt
Sebuah Kristal KNO3 dimasukkan ke dalam tabung reaksi kemudian ditetesi dengan air. Pada tabung reaksi terasa dingin. Reaksi ini dapat digolongkan….
Eksoterm, energi berpindah dari sistem ke lingkungan
Eksoterm, energi berpindah dari lingkungan kesistem
Endoterm, energi berpindah dari sistem ke lingkungan
Endoterm, energi berpindah dari lingkungan ke sistem
Endoterm, energi tidak berpindah
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perubahan entalpi dari reaksi manakah yang berikut ini dapat disebut dengan perubahan entalpi pembentukan ΔHf° Na2SO4 kristal….
2 NaOH (aq) + H2SO4 (aq) → Na2SO4 (aq) + 2H2O (l)
2 NaOH (s) + H2SO4 (aq) → Na2SO4 (s) + 2H2O (l)
Na2O (s) + SO2 (g) → Na2SO4 (s)
2 Na (s) + S (s) + 2O2 (g) → Na2SO4 (s)
16 Na (s) + S8 (s) + 16 O2 (g) → 8 Na2SO4 (s)
5.
MULTIPLE CHOICE QUESTION
3 mins • 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
3 mins • 1 pt
Jika diketahui ΔHc°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
5.740 kj
4722 kj
740 kj
32,8 kj
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Entalpi pembakaran asetilena adalah -1300 kJ, entalpi pembentukan asetilena, C2H2 adalah….
(ΔHf° CO2 = -395 ; ΔHf° H2O = -285 )
-225 kJ
+225 kJ
-450 kJ
+450 kJ
-620 kJ
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