Unit 1 - Rates of Reaction Flashcards
Chemical changes and structure
1
Q
What is the definition of exothermic?
A
The surroundings of the reaction become warmer.
2
Q
What is the definition of endothermic?
A
The surroundings of the reaction become colder.
3
Q
How can rates of reactions be increased?
A
- increasing temperature
- increasing concentration of a reactant
- increasing surface area/decreasing particle size
- through the use of a catalyst
4
Q
What are catalysts?
A
Catalysts are substances that speed up chemical reactions but can be recovered chemically unchanged at the end of the reaction
