Physical and Chemical change Flashcards
0
Q
Chemical change
A
the formation of new substances in a chemical reaction. One type of matter is changed into something different
1
Q
Physical change
A
during a physical change, the phase of matter may change, but not its identity.
No new substance is formed
2
Q
Law of constant composition
A
in any given chemical compoun, the elements always combine in the same proportion with each other.
3
Q
Gay-Lussac’s Law
A
in a chemical reaction between gases, the relative volumes of the gases in the reaction are present in a ratio of small whole numbers if all the gases are at the same temperature and pressure.
