Question

(b) the diagram below represents a jiko when in use. study it and answer the questions that follow.
(i) write equations for the reactions that occur in region
i. b (1 mark)
ii. c (1 mark)
(ii) explain what happens in region a. (1 mark)

Explanation:

Step1: Reaction in region B

In region B, there is excess air. Carbon (from fuel) reacts with oxygen to form carbon dioxide.
$$C + O_{2}\xrightarrow{\text{heat}}CO_{2}$$

Step2: Reaction in region C

In region C, there is limited air. Carbon dioxide reacts with hot carbon to form carbon monoxide.
$$CO_{2}+C\xrightarrow{\text{heat}}2CO$$

Step3: What happens in region A

In region A, carbon monoxide (from region C) burns. It reacts with oxygen to form carbon dioxide and produces a blue flame.
$$2CO + O_{2}\xrightarrow{\text{heat}}2CO_{2}$$

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 (\(2CO + O_{2}\xrightarrow{\text{heat}}2CO_{2}\)) and produces a blue flame.