7.1: Describing Reactions
7.2: Types of Reactions
7.3: Energy Changes in reactions
7.4: Reaction Rates
7.5: Equilibrium
100
Substances that undergo a change
What is reactants
100
List the 5 main types of reactions
What are synthesis, decomposition, single-replacement, double-replacement, and combustion
100
Formation of chemical bonds _________ energy
What is releases
100
The rate at which reactants change in to products over time
What is reaction rate
100
A state in which the forward and reverse paths of a change take place at the same rate
What is equilibrium
200
A representation of a chemical reaction in which reactants and products are expressed as formulas
What is a chemical equation
200
2H2O-> 2H2 + O2
What is decomposition
200
Releases energy to its surroundings
What is exothermic
200
Increasing the temperature _________ reaction rate
What is increases
200
When a change is introduced to a system in equilibrium, the equilibrium shifts in the direction that relieves the change
What is Le Chatlier's Principle
300
States that mass is neither created nor destroyed in a chemical reaction
What is the law of conservation of mass
300
AB + CD -> AD + CB
What is double-replacement
300
2HgO + 181.7 kJ -> 2Hg + O2, Endothermic or exothermic?
What is endothermic
300
Decreasing the concentration _______ reaction rate
What is decreases
300
Increasing the temperature shifts the equilibrium towards the side that __________heat from/to the system
What is removes
400
The numbers that appear before the formulas in a chemical equation
What are coefficients
400
CH4 + O2 -> CO2 + 2H2O
What is combustion
400
Breaking bonds requires an _________ of energy
What is input
400
A substance that affects the reaction rate without being used up in the reaction
What is a catalyst
400
A reaction in which the conversion of reactants into products and the conversion of products into reactants can happen simultaneously
What is a reversible reaction
500
New substances formed as a result of a change
What are products
500
A + B -> AB
What is synthesis
500
Absorbs energy from its surroundings
What is endothermic
500
A catalyst _________ the energy barrier of a reaction
What is lowers
500
Increasing the concentration of a reactant shifts the equilibrium how?
What is shifts equilibrium towards the forward reaction
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