Test Unit 2- States Of Matter Flashcards
1
Q
- What is matter in which the particles are free to move in all directions until they have spread evenly throughout their container is a…
A
Gas
2
Q
- Three examples of physical changes are…
A
The boiling of water, blowing up a balloon,and melting a candle
- this is because it only affects its physical state it doesn’t change what it is or the chemical build.
3
Q
- Increasing the surface area of a solid
A
Increases the speed of dissolving
4
Q
- What is it called when particles escape from the surface of a liquid and become gaseous?
A
Evaporation
5
Q
- What liquid is the most viscous?
A
Water
Viscous: a fluids resistance to flow
6
Q
- What property is boiling water?
A
A physical change
7
Q
- Iron and oxygen react to form rust. What will happen to the mass of the rust compared to the mass of the iron and oxygen before the reaction.
A
The mass will stay the same because the law of Conservation of Matter says matter cannot be created or destroyed, even in a chemical change
8
Q
- Explain how salt dissolves in water.
A
- H+ of water attracts Cl-
- O-2 of water attracts Na+
- Attractive force pulls ions away from crystal
- Water surrounds each ions & continues until ions are separated from the crystal
