chemical reaction
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Activation Energy | What is needed to start a chemical reaction.
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| Arrow -----> | you read the arrow as "yields" in a chemical reaction
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| Characteristics of a Chemical Reaction | changes energy or changes in properties (produce a gas (bubbles form), color change, precipitate forms or temperature change)
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| Chemical Changes | alter the chemical properties of matter; new substances with new properties are formed
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| Chemical Equations | a shorter, easier way to show chemical reactions by using symbols instead of words.
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| Coefficient | a number placed in front of a chemical formula in an equation. Tells how many atoms of molecules of each reactant and product take part in the reaction.
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| Conservation of Mass | the amount of matte involved in a chemical reaction does not change. The total mass of the reactants must equal the total mass of the products.
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| Decomposition Reaction | a compound breads breaks down into simpler substances
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| Endothermic Reaction | an observable change in energy that shows a chemical reaction took place; A reaction that takes heat from the solution, absorbs energy, makes it feel cooler.
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| Exothermic Reaction | n observable change in energy that shows a chemical reaction took place; a reaction that releases heat; gives of energy, makes it feel warmer; most chemical reactions are this type.
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| Physical Changes | alter only the physical properties of matter; no new substances are formed. Can be a change in size, shape or color; change in phase (by increasing or decreasing temperature: solid, liquid, gas)
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| Precipitate | a solid that forms from solution during a chemical reaction; observable change that shows a chemical reaction took place.
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