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Summary Nova HAVO/VWOTTO Physics and chemistry

- K Gibbs, et al
ISBN-13 9789402058079
72 Flashcards & Notes
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A snapshot of the summary - Nova HAVO/VWOTTO Physics and chemistry Author: K Gibbs R van Hoeflaken M Kelder C Schatorijé T Seynaeve R Tromp ISBN: 9789402058079

  • 3 Air

  • What are the characteristics of air? Describe air.
    Air is transparent and does not have any smell or taste.
  • 3.1.1 The composition of air

  • What is the composition of air?
    Air is a mixture of gases: nitrogen, oxygen, carbon dioxide and small amounts of other gases (like argon) and contains water vapor.
  • 3.1.1.1 Nitrogen

  • What happens when you breath in nitrogen?
    Nothing is happening to your lungs when you breath in nitrogen.
  • 3.1.1.2 Oxygen

  • Why is oxygen so important to living creatures?
    People and animals need this gas (oxygen) to live.
  • What happens to the oxygen once we inhaled it?
    Oxygen is absorbed into your blood from the air you inhaled thru the lungs. The blood absorbs the oxygen and then transports the oxygen to every part of your body.
  • How does your body supplies itselfs by oxygen?
    By breathing.
  • 3.1.1.3 Carbon Dioxide

  • Give an example how we use carbon dioxide in our life.
    Carbon dioxide is a component to all sorts of drinks: soda (cola, fanta)
  • 3.1.2 Oxygen and combustion

  • Can a mixture of natural gas and air start to burn on their own accord? Or do you need something else?
    No, a mixture of natural gas and air can not start to burn on their own. You need some fuel as well, like a lighter or match.
  • What happens when you burn natural gas?
    When you burn natural gas, two substances are consumed: natural gas and oxygen. Instead of them, you then got hot combustion gasses: water vapour and carbon dioxide.
     
  • Do all flammable substances have the same ignition temperature?
    No, they do not.
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