Nurse cheung: chemical reactions Teas

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20 Terms

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chemical reactions

one or more substances, known as reactants, that are transformed into different substances called products

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reactants

substances present at the start of a chemical reaction that participate in the reaction

reactants are your ingredients (flours, sugar, eggs)

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products

substances that are formed as a result of a chemical reaction

products are what you end up with after the reaction (cake)

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example of reactants (irreversible) products

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example of reactants (reversible) products

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combination/ synthesis

2 or more substances combine to form a single product

<p>2 or more substances combine to form a single product</p>
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decomposition

a single substance breaks down into 2 or more simpler substances

<p>a single substance breaks down into 2 or more simpler substances</p>
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single displacement

one element in a compound is replaced by another element

<p>one element in a compound is replaced by another element</p>
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double displacement

elements in 2 different compounds swap places with each other to form 2 new compounds

<p>elements in 2 different compounds swap places with each other to form 2 new compounds</p>
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combustion

a substance (usually a hydrocarbon) reacts with oxygen to produce heat, light, and typically produces carbon dioxide and water

<p>a substance (usually a hydrocarbon) reacts with oxygen to produce heat, light, and typically produces carbon dioxide and water</p>
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balancing chemical reactions

reactants are the same exact numbers as your products

<p>reactants are the same exact numbers as your products</p>
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another example of balancing chemical reactions

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mole

unit of measurement that is the amount of a pure substance containing the same number of chemical units

<p>unit of measurement that is the amount of a pure substance containing the same number of chemical units</p>
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mole example

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collision theory

for particles to react, they have to collide with each other with sufficient energy

<p>for particles to react, they have to collide with each other with sufficient energy</p>
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exothermic reactions

releases energy to surroundings - release heat

exothermic think “exit”. heat is exiting during this reaction

<p>releases energy to surroundings - release heat</p><p>exothermic think “exit”. heat is exiting during this reaction</p>
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endothermic reactions

takes in heat energy from the surroundings - absorbs heat

endothermic think “enter”. heat enters/absorbs during this reaction

<p>takes in heat energy from the surroundings - absorbs heat</p><p>endothermic think “enter”. heat enters/absorbs during this reaction</p>
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equilibrium

when the rate of the forward reaction equals the rate of the reverse reaction in a closed system

<p>when the rate of the forward reaction equals the rate of the reverse reaction in a closed system</p>
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static

the rate of the forward and reverse reactions are 0. they are static

diamonds

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dynamic

the forward and reverse reactions are occurring at the same time

<p>the forward and reverse reactions are occurring at the same time</p>