Changes in state+Chemical reactions Flashcards
Revision for upcoming exam.
1
Q
What is melting?
A
Melting is when the state of matter solid changes to the state of matter liquid.
E.g: Ice-Water
2
Q
What is freezing?
A
Freezing is when the state of matter liquid changes to the state of matter solid.
E.g:Water-Ice
3
Q
What is boiling/evaporation?
A
Boiling/evaporation is when water gets heated to its boiling point and turns into water vapour.
4
Q
What is condensation?
A
Condensation is when water vapour cools down and becomes a liquid again.
5
Q
What happens when a metal reacts with an acid?
A
It generally reacts to form a salt an hydrogen gas.
6
Q
How can you tell if a chemical reaction has happened?
A
Fizzing, Smoke, Smell, Change in size, Diffusion, Change in texture, Change in colour and Disintegrating
