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18 Cards in this Set
- Front
- Back
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Chemical reaction |
a change in which one or more substances are converted into new substances (arrange atoms) |
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What is the law of conservation of mass |
matter cannot be either created or destroyed but can be conserved (total starting mass- mass of all reactants equals the final mass of all the products) |
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What do bonds do in exothermic -what happens to energy |
Bonds break-> energy is relased |
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what does the substance feel like in exothermic |
warm |
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What is the defintion of exothermic |
Reaction occurs when energy is relased from the system into the surrondings |
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what are some examples of exothermic |
1. wood burning 2. rusting 3. dynamite |
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what do the bonds do in endothermic - what happens to the enrgy |
new bonds form -> energy is absorbed |
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what do substances feel like in endothermic |
substances feel cold |
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what is the defintion of endothermic |
Reaction occurs when the energy is absorbed from the surrounding in the form of heat |
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what i the equaton for endothermic |
reactants + energy = produced |
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what are some signs of a chemical reaction |
Color change, increase, decrease in temperature, gas produced, bubbles. change in properties, new substance, change in: density, smell, taste, melting points formation of gas, temperature, sound, light, heat, or precipation |
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precipate |
liquids come together to form a solid |
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what is the source of chemical energy |
stored within molecules that can be released when a substnance reacts |
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what does every chemical reaction need |
energy |
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reactant |
substance that reacts |
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product |
new product |
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catalyst |
speeds up chemical reeaction |
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inhibitor |
slows down chemical process |
