chemical reactions 2 Flashcards
1
Q
difference between chemical and physical change
A
chemical change is irreversible but physical is reversible
2
Q
chemical reaction
A
chemical process where 2 combine to form a new substance
3
Q
physical change
A
process where matter changes forms
4
Q
law of conversion mass
A
chemical reaction mass is neither created or destroyed
5
Q
what always remains the same in matter
A
number of atoms stays the same before and after change takes place
6
Q
what must be equal in mass
A
reactants and products
7
Q
open system
A
exchanges matter and energy with its surroundings
8
Q
closed systems
A
where no matter can eneter or leave the system
only heat energy is trnasgeered
9
Q
reactants
A
substance you start w before the chemical change takes place
10
Q
product
A
substance produces as a result of the chemical change
