Page 31 - Hybrid PBD 2022 Tg 5 - Kimia

Kimia Tingkatan 5 Bab 3
4. (a) Tentukan sama ada tindak balas berikut adalah eksotermik atau endotermik. Lukis gambar rajah aras
tenaga bagi tindak balas itu. SP 3.1.2 TP2 TP3 KBAT Mengaplikasi
Determine whether the reactions below are exothermic or endothermic. Draw the energy level diagrams for the reactions.
Tindak balas kimia Gambar rajah aras tenaga
Chemical reaction Energy level diagram
(i) Pb + SO 4 ⎯→ PbSO 4 ΔH = –50 kJ mol Pb + SO 2–
2+
2–
–1
2+
4
Tindak balas / Reaction: Tenaga ΔH= –50 kJ mol –1
Energy
Eksotermik / Exothermic PbSO
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4
(ii) CaCO 3 ⎯→ CaO + CO 2 ΔH = +540 kJ mol –1 CaO + CO
2
Tindak balas / Reaction: Tenaga
Energy ΔH= +540 kJ mol –1
Endotermik /Endothermic
CaCO
3

Konsep Visual Gambar Rajah Aras
Gambar Rajah Aras Tenaga Tenaga
Energy Level Diagram Energy Level Diagram
INFO
(b) Berdasarkan gambar rajah aras tenaga, tandakan (✓) bagi pernyataan yang tepat di bawah.
Based on the energy level diagrams, mark (✓) the true statements below.
(i) Suhu campuran bahan tindak balas meningkat semasa pembentukan PbSO 4 . ✓
The reaction mixture temperature increases during the formation of PbSO 4 .
(ii) Jumlah kandungan tenaga CaO dan CO 2 lebih tinggi berbanding dengan CaCO 3 .
The total energy content of CaO and CO 2 is higher than the total energy content of CaCO 3 .
(iii) Haba diserap dari persekitaran semasa penguraian CaCO 3 . ✓
Heat is absorbed from the surroundings during the decomposition of CaCO 3 .

5. Rajah di bawah menunjukkan kesan ke atas ikatan kimia semasa sesuatu tindak balas kimia.
The diagram below shows the effects on the chemical bonds during a chemical reaction. Simulasi
Perubahan Tenaga dalam
Semasa tindak balas kimia Tindak Balas Kimia
During a chemical reaction Energy Changes in
Chemical Reactions
Ikatan kimia di dalam bahan tindak balas diputuskan Ikatan kimia di dalam hasil tindak balas terbentuk
Chemical bonds in the reactants are broken Chemical bonds in the products are formed

(a) Tenaga diserap semasa (b) Tenaga dibebaskan semasa
pemecahan ikatan . pembentukan ikatan .
Energy is absorbed during Energy is released during
bond breaking . bond formation .

Isikan maklumat yang betul tentang perubahan tenaga dan ikatan kimia dengan berpandukan carta di atas.
Gunakan ayat di dalam kotak di bawah. SP 3.1.2 TP1
Write the correct information about energy change and chemical bonds based on the chart above. Use the words given in the box below.
dibebaskan pemecahan ikatan pembentukan ikatan diserap
released bond breaking bond formation absorbed

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03 Hybrid Kimia Tg5.indd 102 05/11/2021 4:18 PM