HABA PENYESARAN

Flashcard
•
Chemistry
•
9th - 12th Grade
•
Hard
Su Ling Thung
FREE Resource
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5 questions
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1.
FLASHCARD QUESTION
Front
Besi yang manakah paling reaktif? Pilihan: Aluminium, zink, kuprum, ferum.
Back
Aluminium
2.
FLASHCARD QUESTION
Front
CuSO4 boleh disesarkan oleh elemen berikut KECUALI? Magnesium, argentum, zink, plumbum
Back
argentum
3.
FLASHCARD QUESTION
Front
Bahan tindak balas yang manakah menghasilkan haba penyesaran
- asid hidroklorik + natrium hidroksida
- etanol + oksigen
- plumbum nitrat + potassium iodida
- argentum nitrate + kuprum
Back
argentum nitrate + kuprum
4.
FLASHCARD QUESTION
Front
Mengapakah tindak balas magnesium dan kuprum(ii) sulfat lebih tinggi daripada zn dan kuprum (ii) sulfat?
Back
magnesium lebih elektropositif daripada zink
5.
FLASHCARD QUESTION
Front
5 g Serbuk zink di masukkan ke dalam 100cm3 larutan plumbum (II)nitrat 0.5moldm-3 . Persamaan termokimia bagi tindak balas ini ditunjukkan di bawah. Zn + Pb2+ → Zn2+ + Pb ∆H = -110kJmol-1 Hitung perubahan haba yang berlaku [Muatan haba tentu larutan :4.2 Jg-1˚C-1 ]
Back
5500 J
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