
ASESMEN TERMOKIMIA
Authored by Darniati Darni
Chemistry
11th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Kapur tohor direakiskan dengan air dalam tabung reaksi sehingga tabung reaksi terasa panas.Raeksi yang terjadi dapat digolongkan dalam reaksi ….
Eksoterm, energi berpindah dari lingkungan ke sistem
Eksoterm, energi berpindah dari sistem ke lingkungan
gi
Endoterm, energi berpindah dari lingkungan ke sistem
Endoterm, energi berpindah dari sistem ke lingkungan
Endoterm, tidak ada perpindahan energi
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diantara reaksi-reaksi berikut, yang merupakan contoh reaksi endoterm yaitu ….
4NH3 (g) + 5 O2 (g) → 4NO (g) + 6H2O (g) ∆H = -905 KJ
CaO (s) → Ca (s) + ½ O2 (g) ∆H = -635,5 KJ
Ca (s) + C (s) +3/2 O2 (g) → CaCO3 (s) ∆H = 1207,1 KJ
Fe3O4 (g) + 4H2 (g) → 3Fe (s) + 4H2O (g) ∆H = -D Kal
2HBr (g) → H2 (g) + Br (g) ∆H = -E Kal
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebanyak 200 ml larutan NaOH 1 M dicampur dengan 200 ml HCl 1 M dan terjadi kenaikan suhu sebesar 10®C. Jika kalor jensi larutan 4,2 J/g.®C dan massa jenis larutan sebesar 1 g/ml, harga ∆H reaksi dari reaksi: NaOH (aq) + HCl (aq) →NaCl (aq) + H2O (l) sebesar ….
– 84 KJ/mol
84 KJ / mol
18,8 KJ /mol
-18,8 KJ /mol
-168 KJ / mol
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui reaksi:
2C (s) + 3H2 (g) + ½ O2 (g) →C2H5OH (l) ∆H = -277,7 KJ/mol.Harga ∆H®d 23 gr etanol (C2H5OH) sebesar …. ( Mr C2H5OH = 46 gr/mol )
-277,7 KJ
277,7 KJ
-138,85 KJ
138,85 KJ
555,4 KJ
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui ∆H®f CO2 = -395,5 KJ/mol, ∆H®f H2O = -285,85 KJ/mol, dan ∆H®f C2H6 = -84,68 KJ/mol.∆H pada reaksi pembakaran 11,2 L gas etana ( 2 C2H6 + 7 O2 → 4CO2 + 6H2O ) pada keadaan STP sebesar ….
3.126, 6 KJ
1.563, 8 KJ
-1.563,8 KJ
781, 9 KJ
-781, 9 KJ
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika kalor yang di serap untuk memanaskan 100 ml air adalah 29,4 J dan kapasitas panas air = 4,2 J/g.®C, besarnya perubahan suhu ( ®C ) adalah ….
10
7
6
5
3,5
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada proses pembuatan tape, bahan yang telah disiapkan ditambahkan sejumlah ragi, kemudian bahan-bahan tersebut diperam dalam tempat tertutup dan dibiarkan. Proses fermentasi berlangsung menurut persamaan:
C6H12O6(s) 𝑒𝑛𝑧𝑖𝑚 → 2C2H5OH(l) + 2CO2(g)
Seiring berjalannya waktu, temperatur di sekitar sistem menjadi lebih tinggi dibandingkan suhu kamar. Hal ini terjadi karena proses fermentasi termasuk reaksi ….
eksoterm, karena entalpi sistem bertambah
ksoterm, karena entalpi sistem berkurang
eksoterm, karena entalpi lingkungan berkurang
endoterm, karena entalpi sistem bertambah
endoterm, karena entalpi sistem berkurang
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