Chemical Reactions Flashcards
1
Q
What happens in a chemical reaction?
A
an intramolecular attraction is broken or formed
2
Q
What happens in a physical change?
A
intermolecular forces are broken or formed
3
Q
Evidence a chemical reaction has occured
A
Formation of a gas, precipitate, heat / energy is absorbed or released, color change
4
Q
Redox reactions
A
Have single elements
5
Q
Combustion Rxns
A
Mlcl with CHO, words like burned / combusted. You have to supply the oxygen.
6
Q
Incomplete Combustion
A
forms CO2, carbon (s)
7
Q
Complete combustion
A
forms CO2 and often excess O2
