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23 Cards in this Set
- Front
- Back
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The reaction N2(g)+3H2(g)-->2NH3(g) can occur only when nitrogen molecules and hydrogen molecules have sufficient energy. |
Activation energy |
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The amounts of nitrogen, hydrogen, and ammonia in this reaction do not change |
Equilibrium |
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The rate of this reaction can be increased by adding a mixture of iron, potassium oxide, and aluminum oxide. The added materials are not permanently changed. |
Catalyst |
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Some materials can dissolve in water |
Soluble |
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It is important to know the amount of each substance per unit volume |
Concentration |
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Name 3 ways you can speed up a chemical reaction |
1. Add a catalyst 2. Add an enzyme 3. Raise the concentration |
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Name 3 ways you can slow down a chemical reaction |
1. Add an inhibitor 2. Lower the activation energy 3. Lower the concentration |
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A substance that undergoes a reaction |
Reactant |
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A new substance formed when reactants undergo a chemical change |
Product |
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A number placed in front of the parts of a chemical equation to indicate how many are involved; always a positive whole number |
Coefficient |
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The name applied to a reaction in which two or more substances combine to form a single product |
Synthesis |
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The name applied to a reaction where a compound breaks down into two or more substances |
Decomposition |
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A type of reaction in which one element takes the place of another in a compound |
Single displacement |
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A type of reaction in which the positive and negative portions of two ionic compounds are interchanged; at least one product must be water or a precipitate |
Double displacement |
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Term for a reaction in which a substance rapidly combines with oxygen to form one or more oxides |
Combustion |
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Term for a system where no net change occurs in the amount of reactants or products |
Equilibrium |
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Term describing a system in which opposite reactions are taking place at the same rate |
Dynamic equilibrium |
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States that if a stress is applies to a system at equilibrium, the system shifts in the direction that relieves the stress |
Le Chatelier's principle |
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The amount of energy the particles in a reaction must have when they collide for the reaction to occur |
Activation energy |
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The amount of a substance present in a unit volume |
Concentration |
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The reactant of which there is not enough; when it is used up, the reaction stops and no new product is formed |
Limiting reactant |
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A biological catalyst |
Enzyme |
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A principle that states that matter is neither created nor destroyed |
Law of conservation of mass |
