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26 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Name things that make a chemical reaction |
Colour change Gas produced Temp change Production of light Formation of participate Change in pH Production of electricity Change in state |
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What is a physical change? |
Easily reversed Small quantity of energy |
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What's thermal decomposition |
Separate atoms with heat which can produce another substance |
Think of decomposing... What do you need for it in chemistry????? |
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Copper |
Cu |
Starts with c |
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Sulfur |
So |
Starts with s ... |
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Complete combustion |
Enough air supply for carbon atoms E.g ch4 + o2 = co2 + h2o |
Think rubyyyyy .... It's the blue flame |
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Does complete combustion result in more or less energy |
More!!!! |
Come on you know this... Blue flame ... |
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Incomplete combustion |
Not enough oxygen!!! Resulting in to much carbon ! Therefore soot! And carbon monoxide!!!!! |
Yellow flame because carbon burns making a yellow flame, think!!! |
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Independent variable |
Something that's Changed by the scientist! |
Come on think independent! It's changed yes? Who by? |
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Control variable |
It's the thing you keep the same |
Think if it's controlled ..... Not what? |
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Dependent variable |
The main thing that changes, the thing to focus on |
You know this!! What is it that the scientist looks at the most!!!! |
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What influences the use of fuel |
Value Availability How it can be stored Cost of fuel Toxicity Pollution Easy to use? |
Come on there's 7 main reasons! |
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How do you measure thermal decomposition |
The amount of co2 released |
What's released????? How much? |
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Balance this!! Ch4+o2=co2+h2o |
Ch4+2o2--->co2+2h2o |
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Carbonate |
Co3 |
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Zink |
Zn |
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Combustion |
A rapid reaction between substances and oxygen that releases heat and light when a substance burns it's said to combust |
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Compressed fuels |
Hydrogen, methane, propane |
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Hydrofuel? |
A fuel that combusts |
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Ecofriendly fuel |
Hydrogen |
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Exothermic |
Gives out heat, release of energy as heat |
Exo skeleton means on the outside think out.... Giving out.... |
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Endothermic reaction |
Absorbs heat, absorbs energy |
Think opposite of releasing is ..... |
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If a reactions temperature decreases ... Is it exo or endothermic?? |
Exothermic!!! |
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In a reaction the temp increases what is it? |
Endothermic!!! |
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Breaking bonds requires what???? |
Energy!!! |
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Forming bonds release what??? |
Energy!!! |
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