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| What does exothermic mean? |
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Definition
| It describes a reaction that releases energy to its surroundings. |
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Term
| What does equilibrium mean? |
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Definition
| It's a state in which the forward and reverse paths of a change take place at the same rate. |
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Definition
| It's a subsatnce that affects the reaction rate without being used up in the reaction. |
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Definition
A reaction in which a compound breaks down into two or more simpler substances.
ex. AB-> A+B |
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Definition
A reaction in which two or more substances react to form a single substance.
ex. A+B-> AB |
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Definition
| The mass of one mole of a substance. |
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Definition
| A number that appears before a formula in a chemical equation. |
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Definition
| A reaction in which a substance reacts rapidly with oxygen, often producing heat and light. |
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Definition
| The substances formed as the result of a chemical change. |
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Definition
| A chemical reaction that absorbs energy from its surroundings. |
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Term
| True or false: A chemical equation must be balenced in order to show that mass is conserved during a reaction. |
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Definition
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Term
| Chemists use a counting unit called a _______ to measure amounts of substances because chemical reactions often involve large numbers of small particals. |
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Definition
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Term
| What is a double replacement reaction? |
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Definition
A reaction in which two different compounds exchange positive ions to form two new compounds.
ex. AB+CD-> AD + CB |
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Term
| What is an oxidation-reduction reaction? |
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Definition
| A reaction in which electrons are transferred fro mone reactant to another. |
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Term
| What is the process in which an element gains electrons during a chemical reaction. called? |
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Definition
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Term
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Definition
| The energy stored in bonds of a substance. |
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Term
| During a chemical reaction, energy is either _______ or _______. |
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Definition
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Term
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Definition
| The rate at which reactants change into products over time. |
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Term
| Generally, an increase in temperature will _________ the reaction rate. |
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Definition
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Term
| How does an increase in surface area affect the exposure of reactants to one another? |
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Definition
| An increase in surface area increases the exposer of reactants to one another. |
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Term
| One way that a catalyst can lower the energy barrier of a reaction is by providing a surface on which the ___________ can come together. |
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Definition
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Term
| What are thw two types of Equilibria? |
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Definition
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Term
| What are factors affecting chemicla equilibrium? |
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Definition
1. Temperature
2. Pressure |
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Term
| What happens when a physical change doesn't go to comletion? |
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Definition
| A physical equilibrium is established between the forward and reverse changes. |
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Term
| What happens when a chemical change doesn't go into completion? |
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Definition
| A chemical equilibrium is established between the forward and reverse reactions. |
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Term
| What is a single replacement? |
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Definition
A reaction in which one element takes place of another element in a coumpound.
ex. A+BC-> B+AC |
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