
Quiz Hukum Hess
Authored by Nilawati Nilawati
Chemistry
11th Grade
Used 1+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 20 pts
Diketahui persamaan termokimia sebagai berikut :
2NO(g) + O2(g) → N2O4(g) ΔH = a kJ
NO(g) + O2(g) → NO2(g) ΔH = b kJ
Besarnya ΔH untuk reaksi :
2NO2(g) → N2O4(g) adalah,....
(a+b) kj
(a+2b) kj
(-a+2b) kj
(a-2b) kj
(2a+b) kj
2.
MULTIPLE CHOICE QUESTION
30 sec • 20 pts
Ciri-ciri reaksi eksoterm adalah....
Lingkungan menyerap kalor dari sistem
Sistem menyerap kalor dari lingkungan
Sistem dan lingkungan memiliki kalor sama
Kalor sistem dan lingkungan jika dijumlahkan sama dengan nol
Pada akhir reaksi, kalor lingkungan selalu lebih kecil dari kalor sistem
3.
MULTIPLE CHOICE QUESTION
30 sec • 20 pts
Sebanyak 2 mol gas hidrogen jika direaksikan dengan 1 mol gas oksigen akan terbentuk uap air yang membutuhkan kalor sebesar 484 kJ. Persamaan termokimianya adalah ….
H2(g) + ½ O2(g) --> H2O(g) ΔH = 484 kJ
2 H2(g) + O2(g) --> 2 H2O(g) ΔH = 484 kJ
2 H2(g) + O2(g) --> 2 H2O(g) ΔH = –484 kJ
2 H2O(g) --> 2 H2(g) + O2(g) ΔH = –484 kJ
H2O(g) --> H2(g) + ½ O2(g) ΔH = 484 kJ
4.
MULTIPLE CHOICE QUESTION
30 sec • 20 pts
Ke dalam tabung reaksi yang berisi air dilarutkan urea padat. Ternyata jika dipegang pada tabung reaksi terasa dingin. Yang dimaksud dengan sistem pada peristiwa ini adalah .....
Urea
Air
Urea dan Air
Urea, air dan tabung reaksi
Tangan dan tabung reaksi
5.
MULTIPLE CHOICE QUESTION
30 sec • 20 pts
Terjadinya reaksi endoterm ditunjakkan pada gambar nomor…
1 dan 3
2 dan 4
1 dan 4
1 dan 2
3 dan 4
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