Page 11 - Praktis Topikal A+ Sains Tg 3_Pan Asia Publications

Soalan Subjektif
B.Teks: Ms 148 – 152
5.1 Tindak Balas Endotermik dan Eksotermik
Endothermic and Exothermic Reactions

1. Padankan tindak balas berikut dengan jawapan yang betul. TP1
Match the following reactions with the correct answers.

(a) Letupan bom
Bomb explosion
(b) Respirasi (i) Tindak balas endotermik
Respiration Endothermic reactions
(c) Pengaratan besi
Rusting of iron
(d) Peneutralan larutan berasid oleh alkali
Neutralisation of acidic solution by alkaline (ii) Tindak balas eksotermik
(e) Membakar kek Exothermic reactions
Baking a cake

2. Isi tempat kosong dengan perkataan yang betul. TP2
Fill in the blanks with the correct words.

Termokimia Endotermik Eksotermik Dibebaskan Diserap
Thermochemistry Endothermic Exothermic Released Absorbed

Termokimia
©PAN ASIA PUBLICATIONS
ialah kajian tentang perubahan yang berlaku semasa tindak balas kimia dan
(a)
terbahagi kepada dua, iaitu tindak balas endotermik dan tindak balas eksotermik .
Thermochemistry is a study about changes in heat during a chemical reaction and can be classified into
two, which is endothermic reaction and exothermic reaction.

(b) Dalam tindak balas endotermik , haba diserap daripada persekitaran manakala dalam

tindak balas eksotermik , haba dibebaskan ke persekitaran.

In an endothermic reaction, heat is absorbed from the surrounding whereas in the exothermic
reaction, heat is released to the surrounding.

(c) Perubahan tenaga berlaku semasa proses peleburan dan pembekuan. Semasa peleburan,
tenaga haba diserap manakala semasa pembekuan, tenaga haba dibebaskan .

Changes in energy happen during melting and freezing. During melting, heat energy is absorbed

whereas during freezing, heat energy is released .

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