Vocabulary
What is an exothermic reaction?
Chemical reaction where heat is released
What is the small number beside a symbol called?
Subscript
What must happen to the atoms for a chemical reaction to start?
The chemical bonds must be broken
Write the formula for a dioxide tricarbon molecule.
O2C3
What is a double displacement reaction?
When two molecule switch places in a reaction
What is an endothermic reaction?
Chemical reactions that absorb heat and feels cold
What is the large number in front of the symbol called?
Coefficient
What is an Inhibitor?
A substance that slows down or stops a chemical reaction.
Balance this equation:
_Na + Cl2 —---> __NaCl
Put a 2 as the coffiecent
What is a single displacement reaction?
When one atom or molecules takes the place of another in a reaction
What is activation energy?
The smallest amount of energy to start a chemical reaction
What does the subscript tell us?
How many atoms of that element are in the compound.
What must be present for a reaction to begin?
Energy
What is a diatomic molecule?
2 atoms of the same element like O2
If two elements create a compound what type of compound is made?
Synthesis
What is absorbed energy?
Energy is pulled into a reaction
What part of the equation means to make, produce or yield?
The arrow
What is a catalyst?
A substance that speeds up a reaction and makes the reaction use less energy to start
How many atoms are in CH4NaCl2?
8
What type of chemical reaction is this NaCl3 —-----> Na + 3Cl?
Decomposition Reaction
What is released energy?
Energy is released from a reaction
On what side are the reactants and what side do you find the product?
Reactants on the left side and product is on the right side.
List the ways to change the rate of a chemical reaction and give an example of each.
Temperature- cooking
Concentration- saltwater in a chemical reaction.
Surface area- grinding up a substance before the reaction
If a chemical symbol has no subscript how many atoms does it have?
1 atom
What kind of reaction is 6CO2 + 6H2O —----> C6H12O6 + 6O2?
Single displacement