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BeaverLocal 7
| Question | Answer |
|---|---|
| when substances go through chemical changes to form new substances this happens | chemical reactions |
| a substance that participates in a chemical reaction | reactant |
| a substance that forms in a chemical reaction | product |
| chemical reations always involve changes in what? ` | energy |
| the energy released when a chemical compound reacts to produce new compounds | chemical energy |
| what must be added to break bonds? | energy |
| a chemical reaction in which energy is released to the surroundings as heat | exothermic reaction |
| a chemical reaction that requires energy input | endothermic reaction |
| what type of reaction is photosynthesis? | endothermic reaction |
| uses symbols the represent a chemical reaction and show the relationship between the reactants and products of reaction. | chemical reaction |
| what equations account for the conservation of mass | balanced chemical equations |
| the relative number of moles of the substances required to produce a given amount of product in a chemical reaction | mole ratio |
| you can use patterns to identify kinds of chemical reactions and to predict the products of what? | chemical reations |
| reaction in which two or more substances combine to form a new compound | synthesis |
| a reaction in which a single compound breaks down to form two or more simpler substances | decomposition |
| the oxidation reaction of an organic compound in which heat is released | combustian reaction |
| a reaction in which one element or radical takes the place of another element or radical in a compound | single displacement reaction |
| a reaction in which, a gas, a solid precipitate, or a molecular compound forms from the apperant exchange of atoms or ions between two compounds | double displacement reaction |
| an atom or a group of atoms that has one unpaired electron | free radical |
| any chemical change in which one species is oxidized and another species is reduced | oxidation reduction reaction |
| a substance that changes the rate of a chemical reactionwithout being consumed or changed significally | catalyst |
| a molecule, either protien or RNA, thatacts as a catalyst in boichemical reactions | enzyme |
| the reactant in reactions catalyzed by enzymes | substrate |
| a state of balence in which the rate of a forward reaction equals the rate of the reverse reaction and the concentration of products and reactants remain unchanged | chemical equilibrium |
| Does a chemical reaction create the atoms of the product or destroy the atoms of the reactant? | No, a chemical reaction merely REARRANGES the bonds between the atoms |
| Does the MASS stay the same during a chemical reaction? | Yes |
| What forms of energy assist in breaking the bonds of atoms? | heat, electricity, sound, or light |
| T or F: Energy is a chemical reaction CAN change form, energy IS NEVER created or destroyed | True |
| All combustion reactions are what type of reaction? | Exothermic reaction |
| How much energy does the product have in an exothermic reaction? | The product has less energy than the reactant in an exothermic reaction |
| What happens to the temperature when an endothermic reaction occurs? | The temperature drops |
| Is photosynthesis an exothermic or endothermic reaction? | Endothermic |
| Which side of the equation are reactant on? | The left side |
| Which side of the equation are the products on? | The right side |
| What does the "--->" mean in a chemical equation? | yield |
| Fill in the blank: ___________ yield products | Reactants |
| Placing a number in front of a compound in a chemical reaction describes the relative amount of that compound. What is that number called? | The coefficient |
| Which law is this?: A compound always contains the same elements in the same proportion regardless of how the compound is made or houw much of the compound is formed | Law of definite proportions |
| Identify the type of chemical reaction: A + B ---> AB | Synthesis Reaction (the product is a compound that is more complex than the reactant) |
| Identify the type of chemical reaction: AB --> A + B | Decomposition Reaction (large molecules in the reactant is broken down to make other products) |
| What is a reactant in EVERY combustion reactions? | Oxygen |
| Identify the type of chemical reaction: AX + B ----> BX + A | Single Displacement Reaction (the elements trade places) |
| Identify the type of chemical reaction: AX + BY ----> AY + BX | Double Displacement Reaction (two compounds exchange ions) |
| Why is an uncharged hydrogen atom a free radical? | An uncharged hydrogen atom is a free radical because it has one available electron for bonding |
| What are substances called that accept electrons? | Reduced substances |
| What are substances called that give up electrons? | Oxidized substances |
Created by:
kjones0722
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