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Chemical Changes
Chemical Reaction Classes
Chemical Reactions and Energy
Reaction Rates
School Analogies of Rxn Rates
100
A ________ _________ is a change in which one or more substances are converted into two substances.
Chemical reaction
100
What type of reaction occurs when a substance reacts with oxygen to produce energy in the form of heat and light?
Combustion Reaction
100
What is a chemical reaction that releases energy?
Exergonic reaction
100
What model states that atoms, ions, and molecules must collide in order to react?
Collision model
100

Factors Affecting Reaction Rates: School hallways being smushed is a parallel to what factor in reaction rates?

Volume

200
What are the starting substances in a chemical reaction called?
Reactants
200
What type of reaction is A + BC -----> AC + B?
Single displacement
200
___________ reactions give off thermal energy.
Exothermic
200
At higher ____________, reacting particles move faster and collide more.
Temperature
200

Factors Affecting Reaction Rates: Increasing the number of students to cause more collisions is a parallel to what factor in reaction rates?

Concentration (of reactants)

300
What are the new substances in a chemical reaction called?
Products
300
What type of reaction is A + B ------> AB?
Synthesis
300
What type of chemical reactions absorb energy?
Endergonic reaction
300
A ____________ is a substance that speeds up a chemical reaction.
Catalyst
300

Factors Affecting Reaction Rates: Passing time between classes is shortened to cause students to move quickly which is a parallel to what factor of reaction rates?

Temperature (adding heat)

400
What does the following symbol stand for? (s)
Solid
400
What type of raection is AB ------> A + B?
Decomposition
400
Figure 14 has a picture of a chemical reaction inside something. What is it?
Firefly
400
What are substances that are used to slow down a reaction?
Inhibitors
400

Factors Affecting Reaction Rates: Not allowing cliques (groups of like students) to bunch up and move together tightly is a parallel to what factor of reaction rates?

Surface Area (more room for reactants to collide and react)

500
What does the arrow stand for in a chemical equation?
Produces or yields
500
What type of reaction is AB + CD ------> AD + CB?
Double displacement
500
_____________ reactions absorb thermal energy.
Endothermic
500
What type of reaction can occur in both the forward and reverse directions?
Reversible reaction
500

Factors Affecting Reaction Rates: Using a matchmaker in school to encourage collisions more quickly is a parallel to what factor of reaction rates?

Catalyst added (speeds up reactions). Remember the opposite can be done with an inhibitor (slow down reactions).