Air and water-12

Fuel is

A substance that releases a large amount of energy when combusted

fuel is combusted to

Fossil fuel

Fuel is combusted to

Hydrogen gas H2

Fuel is combusted to

Co - carbon monoxide

Fuel is combusted to

235 U

Fossil fuel as solid

Coal

Fossil fuel as liquid

Crude oil

Fossil fuel as gas

Natural gas

Hydrogen is

Safe

Hydrogen is safe for the environment

Because When combusted water is formed which is harmless

Doesn't need for oxygen to release energy

235 u

To set a fire, you need

Fuel, oxygen, heat

Explain why liquid fuel fuel is better fuel

Its Easy to store, easy to transport

Explain ally fossil fuel is not a good fuel

When combusted, so is formed, which causes acidic rain

Explain what is meant by the term fossil fuel

Coal, crude oil, natural gas formed over a long period of time from animal bodies and plants

two gases that cause acidic rain

sulfur dioxide So2

oxides of nitrogen NOx

sources of SO2 in the atmosphere

burning of fossil fuel and volcanoes

source of NOx in the atmosphere

inside the engine chamber under high temperature and pressure, N2 and O2 react to form NO,NO2

effect of acid rain

attack of building of limestone

attack rainforest

increases acidity of lakes

three elements present in coal

oxygen, hydrogen, nitrogen

94.5% of natrual gas

methane

two gases that don’t damage limestone buildings

nitrogen and carbon monoxide

chemical reaction that decreases pollution in the air

2NO + 2CO → 2CO2 + N2 occurs in catalytic converter

define catalytic converter

a device that converts harmful gases into harmless gasses

source of lead in the air

leaded petrol

effect of lead compounds

damaging brain cells in young children

how does a catalytic converter convert harmful gasses into harmless gases

CO + NOx + CxHy → CO2 + N2 + H2O

Co is oxidized to CO2

NOx is reduced to N2

CxHy is converted to CO2 ans H2O

reaction in engine of a motor car

N2 + O2 → 2NO

reaction in exhaust of a motor car

2CO + 2NO → 2CO2 + N2

which gas cannot be removed from the exhaust gasses using catalytic converter

carbon dixiode

explain how carbon monoxide is formed in the car engines

incomplete combustion

explain how oxides of nitrogen is formed in the car engines

inside engine chamber under high temperature and pressure N2 ans O2 react to form NOx

effect of carbon monoxide on human health

toxic reduces the capacity of blood to transport oxygen

main two stages in water prufication

filtration and chlorination

filtration in water purification

to remove the insoluble substances

chlorination in water purification

adding Cl2 to kill bacteria

distillation gives

then most pure water

Deionised

purification of water by removing the ions

water purfication used to obtain drinkable water from sea water

distillation

river water

to settling tank

filtration

to chlorenation

two industrials uses of water

drinking and washing

explain how acid rain is for,dd

SO2 ans NOx are the source of acidic rain

SO2 is formed by burning of fossil fuel

NOx is formed inside engine chamber under high temperature and pressure N2 and O2 react to form NOx

how to collect gas in soluble water which is more dense than air

upward delivery

example of gas which is soluble water and more dense than air

NH3

how to collect gas insoluble water which is more less than air

downward delivery

example of gas which is soluble water and less dense than air

SO2

collecting Gas which is insoulble in water

water displacement

exmaple of gas which is insoluble in water

ethene C2H4