C3.1.5 - Cars: pros and cons Flashcards
What are the pros of cars?
They make it easier to travel long distances
They are convenient
Stay warm/dry when travelling
What are the cons of cars?
Drivers walk less - more likely to be obese
Cars cause pollution
Road accidents
What is a hydrocarbon?
A compound containing only carbon and hydrogen
What is a compound?
When 2 atoms of two different elements are chemically joined together.
What is the most common hydrocarbon found in petrol?
Octane
When we burn something we are carrying out a _____________ reaction
combustion
When octane burns in oxygen what is produced?
Carbon dioxide and water
Octane + Oxygen –>
Octane + Oxygen –> Carbon Dioxide + Water
How does the water and oxygen produced when petrol burns escape from the car?
Via the exhaust pipe
Carbon dioxide is a __________ gas
greenhouse
What effect does carbon dioxide have on the environment?
It causes the global warming and climate change because it is a greenhouse gas
Petrol car engines get very hot, what does this cause to happen?
Nitrogen in the air reacts with oxygen to produce nitrogen monoxide.
In a petrol engine: Nitrogen + Oxygen –>
Nitrogen Monoxide
In a diesel engine: Nitrogen + Oxygen –>
Nitrogen Dioxide
Diesel car engines get very hot, what does this cause to happen?
Nitrogen in the air reacts with oxygen to produce nitrogen dioxide.
