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Chapter 7 Chemical Reactions-Terms
Transcript of Chapter 7 Chemical Reactions-Terms
A substance that undergoes change in a chemical reaction.
New substances formed as a result of a chemical reaction.
A representation of a chemical reaction in which the reactants and products are expressed as formulas.
By: Katherine Marks 7th hour
Numbers that appear before a formula in a chemical equation to show that relative proportions of each reactant and product.
An amount of a substance that contains approximately 6.02 x 10^23 particles of the substance.
mixed to make a complex product.
were lumpy and impossible to separate.
It felt like the
would never balance.
You can never change subscripts when balancing an equation but you can add
to make it balance.
takes some studying to understand.
The mass of one mole of a substance.
of water is about 18g/mol.
A chemical reaction in which two or more substances react to form a single substance.
is one of the most common types of chemical reactions.
A chemical reaction in which a compound breaks down into two or more simpler substances.
The general form for a
is AB A + B.
A chemical reaction in which one element takes the place of another element in a compound.
An example of
is when magnesium replaces hydrogen in water to make magnesium hydroxide and hydrogen gas.
A chemical reaction in which two compounds exchange positive ions and form two new compounds.
Double- replacement reaction
is generally in the form of AB + CD AD + CB.
A chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light.
is exothermic, meaning it produces heat.
A chemical reaction in which electrons are transferred from one reactant to another.
In our bodies a sequence of
are used to burn sugars and fatty acids.
The energy stored in chemical bonds.
Dry wood is a store of
A chemical reaction that releases energy to its surroundings.
generate energy, an example is fuel combustion.
A chemical reaction that absorbs energy from its surroundings.
needs energy to work, an example is melting ice.
The rate at which reactants change into products over time.
is much quicker than others.
A substance that affects the rate of a chemical reaction without being used up in the reaction.
To speed up reactions you can add a
A state in which the forward and reverse paths of a physical or chemical change take place at the same rate.
A see-saw who's loads are even, is an example of an
A chemical reaction in which the conversion of reactants into products and the conversion of produces into reactants happens at the same time.
An example of
is going left or right and arriving at your destination.