Quiziz Perubahan Entalpi

Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
PKB Ahmad
Used 4+ times
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Apa yang dimaksud dengan perubahan entalpi?
Perubahan suhu yang terjadi selama reaksi berlangsung.
Perubahan energi dalam bentuk kalor pada tekanan tetap.
Perubahan volume gas selama reaksi berlangsung.
Perubahan massa zat yang bereaksi.
Perubahan wujud zat dalam reaksi.
2.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Pernyataan berikut yang benar tentang reaksi endoterm adalah:
Energi dilepaskan ke lingkungan, suhu lingkungan naik.
Energi diserap dari lingkungan, suhu lingkungan turun.
Reaksi selalu menghasilkan gas.
Reaksi berjalan tanpa memerlukan energi tambahan.
Energi reaksi tetap konstan sepanjang proses.
3.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Pada reaksi berikut:
2H₂(g) + O₂(g) → 2H₂O(l), ΔH=−571,6 kJ
Apa arti dari nilai ΔH=−571,6 kJ
Reaksi menyerap 571,6 kJ energi.
Reaksi melepaskan 571,6 kJ energi.
Reaksi tidak melibatkan perubahan energi.
Energi diperlukan agar reaksi terjadi.
Suhu lingkungan menurun selama reaksi berlangsung.
4.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Diketahui reaksi pembakaran karbon:
C(s) + O₂(g) → CO₂(g), ΔH=−394 kJ
Jika terdapat 3 mol karbon yang dibakar sempurna, berapa energi yang dilepaskan?
−1182 kJ
−394 kJ
−788 kJ
−1970 kJ
−3940 kJ
5.
OPEN ENDED QUESTION
1 min • 13 pts
Jelaskan mengapa perubahan entalpi suatu reaksi bisa bernilai positif atau negatif?.........
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