
Termokimia
Authored by Bunga Sari
Chemistry
11th Grade
Used 8+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Jika Mila memasukkan bongkahan batu kapur ke dalam air, akan terjadi gelembung-gelembung gas dan wadah akan terasa panas. Pernyataan yang benar dari data percobaan tersebut adalah...
Reaksi tersebut merupakan reaksi eksoterm karena sistem menyerap kalor dari lingkungan
Reaksi tersebut merupakan reaksi eksoterm karena sistem melepas kalor ke lingkungan
Reaksi tersebut merupakan reaksi endoterm karena lingkungan menerima kalor dari sistem
Reaksi tersebut merupakan reaksi endoterm karena lingkungan menyerap kalor dari sistem
Reaksi tersebut merupakan reaksi eksoterm karena lingkungan melepas kalor ke sistem
2.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Perhatikan beberapa proses berikut :
(1) Dekomposisi Termal
(2) Respirasi
(3) Pelelehan
(4) Fotosintesis
(5) Pembakaran
Proses yang tergolong proses endoterm ditunjukkan oleh nomor.....
(1), (2), dan (3)
(1), (2), dan (4)
(1), (3), dan (5)
(2), (3), dan (5)
(2), (4), dan (5)
3.
MULTIPLE CHOICE QUESTION
45 sec • 4 pts
Perhatikan tiga reaksi berikut :
1. NaCl(s) → Na(s) ₊ ½Cl2(g) ΔH = +410,9 kJ⁄mol
2. N2(g) ₊ 3⁄2H2(g) → NH3(g) ΔH = -46 kJ⁄mol
3. C3H8 ₊ 5O2 → 3CO2(g) ₊ 4H2O(l) ΔH = -24 kJ⁄mol
Jenis ketiga perubahan entalpi pada reaksi di atas berturut-turut adalah...
Entalpi pembentukan, entalpi penguraian, entalpi pembakaran
Entalpi pembakaran, entalpi penguraian, entalpi pembentukan
Entalpi penguraian, entalpi pembentukan, entalpi pembakaran
Entalpi pembentukan, entalpi pembakaran, entalpi penguraian
Entalpi penguraian, entalpi pembakaran, entalpi pembentukan
4.
MULTIPLE CHOICE QUESTION
2 mins • 8 pts
Diketahui :
ΔHf° C2H4(g) = 52 kJ⁄mol
ΔHf° CO2(g) = -393,5 kJ⁄mol
ΔHf° H2O(l) = -285,8 kJ⁄mol
Kalor yang dilepas untuk membakar 5,6 gram gas etena adalah....
141,1 kJ
-282,1 kJ
-564,4 kJ
-423,3 kJ
-846,6 kJ
5.
MULTIPLE CHOICE QUESTION
2 mins • 8 pts
Diketahui data energi ikatan rata-rata dari :
C=C = 607 kJ⁄mol
C-C = 348 kJ⁄mol
C-H = 410 kJ⁄mol
Hitunglah perubahan entalpi dari reaksi:
CH2 = CH2 + H2O → CH3 - CH2 - OH
-42 kJ⁄mol
+42 kJ⁄mol
+84 kJ⁄mol
-84 kJ⁄mol
+92 kJ⁄mol
6.
MULTIPLE CHOICE QUESTION
2 mins • 7 pts
Diberikan persamaan termokimia berikut :
2CaO(s) → 2Ca(s) + O2(g) ΔH = +1270 kJ
Jika kalor yang diserap 2540 kJ, massa CaO yang terurai adalah (Ar Ca = 40, O = 16)
11,2 gram
22,4 gram
56 gram
112 gram
224 gram
7.
MULTIPLE CHOICE QUESTION
2 mins • 7 pts
Diberikan persamaan termokimia sebagai berikut :
CH4 + 2O2 → CO2 + 2H2O ΔH = -900 kJ
Apabila kalor yang dihasilkan 1350 kJ, volume gas CO2 (STP) adalah...
33,6 Liter
44,8 Liter
22,4 Liter
11,2 Liter
5,6 Liter
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