physical and chemical changes Flashcards
1
Q
define physical changes
A
A change that alters some specific property of matter without changing the composition of its molecules
2
Q
defiine chemical changes
A
a change that alters the specefic properties of a substance by bringing change in its molecular composition followed by a change in state is known as a chemical change.
3
Q
define exothermic reaction
A
the chemical reaction which proceed with the release of heat energy are called exothermic reactions.
4
Q
what is quick lime
A
CaO
5
Q
define endothermic reaction
A
the chemical reactions which proceed with the absorption of heat energy are called endothermic reactions.
