Revision Chapter 5
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Transcript of Revision Chapter 5
5.1 The composition of air
78%
0.03% 21%
1%R: …………………………….
P: ………………………….
Q: ………………………..
Diagram 1.1
Carbon dioxideoxygen
nitrogen
1) Why air is a mixture?Percentage of components of air varies(not fixed)
5.2 the properties of oxygen and carbon dioxide
State whether the following statements are TRUE or FALSE
a) Oxygen is acidicb) Carbon dioxide is acidicc) Oxygen supports combustiond) Carbon dioxide turns lime water cloudye) A burning splinter is used to test for the
presence of oxygen
FALSE
TRUE
TRUE
TRUE
TRUE
5.3 oxygen is needed for respiration
What is respiration?
Respiration is a process by which our body obtains and uses oxygen to oxidise food for the production of energy. Carbon dioxide and water vapour are released as the by-product
Respiration process :
oxygen glucose energy Carbon dioxide
Water vapour
5.4 oxygen is needed for combustion
• What needed for combustion?
OxygenHeatfuel
The product of combustion
_______ + _______ _______+_____+_____
______+____________+______+_____+____
carbon oxygenCarbon dioxide heat light
hydrocarbon oxygenCarbondioxide
Watervapour heat light