
KUIS KIMIA DASAR
Authored by nanang hermawan
Chemistry
University
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30 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui energi ikatan :
O = H = 464 kJ
O = O = 500 kJ
H – H = 436 kJ
Kalor yang diperlukan untuk menguraikan 9 g air (Mr=18) adalah
8 kJ
121 kJ
222 kJ
242 kJ
472 kJ
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui entalpi pembentukan H2O(g) = -242 kJ/mol, energi ikatan H –H = 436 kJ/mol dan energi ikatan dalam molekul oksigen adalah 495 kJ/mol. Energi ikatan O – H dalam air adalah
1173 kJ/mol
925,5 kJ/mol
804,5 kJ/mol
586,5 kJ/mol
402,25 kJ/mo
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
. Diketahui entalpi pembakaran 1 mol CH4 = -18 kkal, energi ikatan :
O = O = 119 kkal/mol
C = O = 173 kkal/mol
O – H = 110 kkal/mol
Energi ikatan C – H adalah…
6,75 kkal
11,05 kkal
33,13 kkal
66,2 kkal
132,5 kkal
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Hubungan hukum hess pada perhitungan reaksi ∆H adalah
Berguna untuk melancarkan segela aktifitas reaksi
Membantu kalor berjalan saat reaksi berlangsunug
Karna kalor yang berlangsung sangat berguna makanya digunakan hukum Hess
Hukum ini sangat berguna karena kenyataannya tidak semua reaksi dapat ditentukan kalor reaksinya secara eskperimen
Sangat berguna bagi setiap atom-atom yang ada di alam semesta
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Jika suatu sendok serbuk seng dimasukkan ke dalam gas kimia yang berisi larutan HCl,ternyata terbentuk gelembung gas dan dasar tabung berasa panas, reaksi ini dapat digolongkan ..
Eksoterm,energi berpindah dari sistem ke lingkungan
Eksoterm,energi berpindah dari lingkungan ke sistem
Endoterm,energi berpindah dari sistem ke lingkungan
Endoterm,energi berpindah dari lingkungan ke sistem
Endoterm,energi tidak berpindah
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada pemanasan 500 g air bersuhu 30°C diperlukan kalor 90 Kj, jika diketahui kalor jenis air sebesar 4,5 J g‾¹°C‾¹, suhu air setelah pemanasan adalah
81°C
84°C
85°C
70°C
75°C
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dalam suatu reaksi kimia dibebaskan 8,4 kJ kalor. Jika kalor ini digunakan untuk memanaskan 100 cm³ air, maka kenaikan suhunya adalah …. (kalor jenis air = 4,2 J/g/°C)
4,2°C
20°C
8,4°C
30°C
16,8°C
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