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Description
Flashcards by x_clairey_x, updated more than 1 year ago
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Created by x_clairey_x
over 10 years ago
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| Question | Answer |
| How do we make smaller, more useful hydrocarbon molecules from big hydrocarbon molecules? | Mix them with steam and heating them to a high temperature or passing the vapours over a hot catalyst |
| What does cracking hydrocarbons produce? | Saturated hydrocarbons that are used as fuel and unsaturated hydrocarbons |
| What is an unsaturated hydrocarbon? | An alkene, alkenes react with orange bromine water, turning it colourless. Alkenes are double bonded |
| What are plastics made out of? | Polymers |
| What are polymers? | Large molecules created when monomers join together. This is called polymerisation |
| What are smart polymers? | Polymers that may have their properties changed by temperature, light or other changes in their surroundings |
| What are hydrogels? | Polymers that can trap water, they are used for contact lenses |
| What are plastic bottles made out of? | PET |
| What does biodegradable mean? | When something can be decomposed by the actions of microorganisms in soil |
| What can we make biodegradable plastics from? | Plant material such as cornstarch |
| What are the two methods used to create ethanol? | fermentation and hydration |
| What is fermentation? | Enzymes in yeast breakdown the sugar into ethanol and carbon dioxide gas |
| What is hydration? | When ethene gas is reacted with steam in the presence of a catalyst to produce ethanol |
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