C1 - Particles Flashcards
What type of attraction do solids have between their particles?
Strong forces of attraction between particles, holding them in fixed positions in a very regular lattice arrangement.
Do the particles move in a solid?
The particles don’t move from their positions, so all solids keep a definite shape and volume, don’t flow like liquids
What happens if a solid becomes hotter?
The particles normally vibrate about their positions - the hotter the solid becomes, the more they vibrate, causing solids to expand slightly when heated.
what happens if you heat a solid?
If you heat a solid (give the particles more energy), eventually the solids will melt and become liquid.
What type of attraction do liquids have between their particles?
There is some force of attraction between the particles. Free to move past each other, tend to stick together though.
Do particles move in a liquid?
The particles are constantly moving with random motion. The hotter the liquid gets, the faster they move. Causing liquids to expand slightly when heated.
What happens if you cool a liquid?
It will freeze and become solid
What happens if you heat a liquid?
It evaporates (or boils) and becomes a gas.
What type of attraction do gases have between their particles?
Next to no force of attraction between the particles - free to move. Travel in straight lines, only interact when they collide.
Do gas particles move?
The particles move constantly with random motion.
What happens if you cool heat a gas?
The hotter the gas gets, the faster they move, Gases either expand when heated, or their pressure increases.
What happens if you cool a gas?
If you cool a gas, it will condense and become a liquid.
What is a physical change?
When a substance changes from one state of matter to another (e.g. melting, freezing evaporation etc) No new substances are made - the original chemicals just change state.
How do you undo a physical change?
undo through heating or cooling.
What is a chemical change?
During a chemical reaction, bonds between atoms break and the atoms change places - the reactants rearrange themselves to form different chemicals (products).
