Chemical Reactions
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What is an endothermic reaction? | the chemical energy of the reactants is less than the energy of the products. this reaction is usually cooler.
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what is and exothermic reaction? | the chemical energy of the reactants is greater than the energy of the products. this reaction is usually warmer.
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exothermic examples | combustion reactions
liquid-solid
respiration
firefly glow
glowstick chemiluminescent
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endothermic examples | electrolysis
photosynthesis
solid-liquid
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diatomic atoms | H, O, N, I, F, Br, Cl
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synthesis | when 2 or more substances form to make a new simpler substance.
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decomposition | when a complex substance breaks down into two or more simpler substances.
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single replacement | a chemical reaction when a single uncombined element replaces and element that is part of a compound.
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double replacement | when different atoms in two different compounds replace each other.
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what can change the rate of a chemical reaction? | concentration, surface area, catalyst, temperature
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law of conservation of mass | ‘in a chemical reaction atoms are neither created or destroyed. All atoms present in the reactants are also present in the products.
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who invented the law of conservation of mass | Antoine Lavoisier
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Created by:
Helena18
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