Question

(b) the diagram below represents a jiko when in use.study it and answer the questions that fo

(i) write equations for the reactions that occur in region
i. b
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ii. c
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(ii) explain what happens in region a.
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Explanation:

Step1: Reaction in Region B

In region B, there is sufficient oxygen (from the air inlet). Carbon (from the fuel) undergoes complete combustion.
$$C + O_{2}\xrightarrow{\text{heat}}CO_{2}$$

Step2: Reaction in Region C

In region C, carbon dioxide (from region B) reacts with hot carbon (fuel).
$$CO_{2}+C\xrightarrow{\text{heat}}2CO$$

Step3: Explanation for Region A

In region A, carbon monoxide (from region C) burns.
$$2CO + O_{2}\xrightarrow{\text{heat}}2CO_{2}$$
The reaction is exothermic (releases heat), which is the heat used for cooking.

Answer:

i.
I. \(C + O_{2}\xrightarrow{\text{heat}}CO_{2}\)
II. \(CO_{2}+C\xrightarrow{\text{heat}}2CO\)
ii. Carbon - monoxide burns (reacts with oxygen) to form carbon dioxide. The reaction \(2CO + O_{2}\xrightarrow{\text{heat}}2CO_{2}\) is exothermic (releases heat), providing heat for cooking.