
Persamaan Termokimia
Authored by RAKHEL MEILINDA
Chemistry
11th Grade
Used 1+ times

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5 questions
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1.
OPEN ENDED QUESTION
3 mins • 20 pts
Jelaskan arti dari persamaan termokimia berikut!
C(s) + O2 (g) CO2 (g) ΔH = –393,5 kJ.mol–1
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Answer explanation
Arti dari persamaan termokimia di atas adalah:
a. Setiap pembakaran 1 mol karbon akan dilepaskan kalor sebesar 393,5 kJ.
b. Setiap pembentukan 1 mol gas karbon dioksida dari unsur-unsurnya, dilepaskan kalor sebesar 393,5 kJ
2.
OPEN ENDED QUESTION
3 mins • 20 pts
Tuliskan persamaan termokimia dari pernyataan berikut! Untuk pembakaran sempurna 1 mol metanol (CH3OH) menjadi gas CO2 dan uap air, dilepaskan kalor sebesar 692,6 kJ.
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Answer explanation
Persamaan termokimia dari pembakaran sempurna 1 mol metanol (CH3OH) menjadi gas CO2 dan uap air dilepaskan kalor sebesar 692,6 kJ, yaitu: CH3OH(g) + 3O2 (g) CO2 (g) + 4H2O(l) ΔH = –692,6 kJ.mol–1
3.
OPEN ENDED QUESTION
3 mins • 20 pts
Pada pembentukan (NH4)2Cr2O7 dalam keadaan standar, dibebaskan energi sebesar 2780,08 kJ/mol, tentukan persamaan reaksi pembentukan termokimia!
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Answer explanation
N4(g) + 4H2(g) + 2Cr(s) + 3½O2(g) → (NH4)2Cr2O7(aq) ∆H0f = – 2780,08 kJ
4.
OPEN ENDED QUESTION
3 mins • 20 pts
Pada reaksi pembakaran 2 mol gas NO menjadi gas NO2 , dilepaskan kalor sebesar 114,14 kJ, menurut reaksi: 2NO(g) + O2 (g) 2NO2 (g) ΔH = –114,14 kJ Hitunglah kalor yang dilepaskan jika 1,5 gram gas NO dibakar pada tekanan tetap! (Mr NO = 30)
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5.
OPEN ENDED QUESTION
3 mins • 20 pts
Evaluate responses using AI:
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Answer explanation
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