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.
What is the negative impact of nitrogen dioxide?
Makes asthma worse
Causes acid rain which damages trees, buildings and lake life
What are particulates?
Solid nanoparticles released when diesel burns.
What are the negative impacts of particulates?
Makes asthma worse
Causes heart attacks.
