Category: Uncategorized
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Formation of CO2 in lab
❁ This gas is easily made in the laboratory by adding hydrochloric acid to marble chips . ❁ It is collected by downward delivery as it is heavier than air. – We can test for (CO2) as it will turn limewater milky or put out a lighted…
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Difficulties
Difficulties ❁ There is a good agreement between scientists about how the greenhouse effect works. However, there is less agreement about the extent to which human activities are causing an increased green house effect and so global warming it’s associated climate change. ❁ It is…
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Climate change
Climate changes ❁ Increased global warming will lead to climate change – changes in the average weather experienced over (30 years) or more. ❁Climate change may make it impossible to grow certain food crops in some regions. ❁Melting polar ice, and the thermal expansion of sea water, could cause rising sea levels and the flooding of low…
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Global warming
❁ Some sources of greenhouse gases are natural and some are man-made. ome pictures about (Natural sources) for CO2, CH4 and H2O vapor: Decomposition of vegetation Forest fire (CO2) (CH4) Evaporation from Ocean ( H2O ) ❁ The…
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Green house effect
The green house effect : ❁ Some gases in the Earth’s atmosphere stop heat radiating into space from the Earth. This is called the (greenhouse effect) and the gases involved are called greenhouse gases. They include: 1. Methane. 2. Water Vapor. 3. Carbon dioxide. The diagram shows the Greenhouse effect : ❁ Electromagnetic radiation at…
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Lead compound
▪ Lead compound ➢ They are poisonous and said to cause mental disabillities to young children. ➢ It is formed due to the combustion of leaded fuel. ➢ It can be treated by introducing of unleaded feuls in gas stations.
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Catalytic converter
Catalytic Converter: A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction. Catalytic converters are usually used with internal combustion engines fueled by gasoline or diesel, including lean-burn engines, and sometimes on kerosene heaters…
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Air pollution
➢ Air pollution : pollution is the prensence of harmful substances. Air pollution is a mixture of solid particles and gases in the air. Such as ,Carbon monoxide , oxides of nitrogen ,sulfur dioxides and lead compounds . ➢ Carbon monoxide: Carbon monoxide (CO) is an odorless, colorless gas formed When people are exposed to…
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Gases in air and their uses
Gases in Air: Nitrogen : used in food packaging,fertilizers and in silicon chip production as it is unreactive. Oxygen: used in steel making , welding and in breathing apparatus in hospitals .
Air and Water 