Topic 7: Chemical Reactions Flashcards
1
Q
Chemical Reaction
A
- Process in which a substance is changed into two or more substances
2
Q
What Evidence Shows that a Chemical Reaction/Change has taken place
A
- Color change
- Order/smell
- formation of a solid or a gas
- Release or absorption of heat
*A new substance is formed
3
Q
Reactants
A
- Substances that undergo chemical changes
4
Q
Products
A
- Substances produced by a chemical reaction
5
Q
Exothermic Reaction
A
- Chemical reaction that releases heat energy
- Forms chemical bonds
Ex. explosion, fire
6
Q
Endothermic Reaction
A
- Chemical reaction that absorbs heat energy
- Breaks chemical bonds
Ex. baking a cake
7
Q
Chemical Bonds
A
- Forces atoms to act in a unit
- Store energy
8
Q
What are Some Chemical Reactions that Include Oxygen
A
- Corrosion
- Combustion
- Cellular Respiration
9
Q
Corrosion
A
- Occurs when oxygen in the air reacts with a metal
Ex. rusting
10
Q
Combustion
A
- Requires heat, oxygen and fuel
- Occurs when oxygen reacts with a substance to form a new substance and give of energy
Ex. fire
11
Q
Cellular Respiration
A
- Chemical reactions that takes place with the cells in your body
12
Q
Rusting
A
- Occurs when oxygen reacts with iron to form iron oxide
13
Q
Conservation of Mass
A
- States that matter cannot be created or destroyed
- Total mass of chemical products will be the same as the reactants
