CC1 States of Matter Flashcards
Define mixture
A substance made of more than one thing not chemically bonded together
What are the 3 states of matter?
Solid, liquid and gas
What is the change from a solid to a liquid called?
melting
If the temperature is above the melting point of a substance but below the boiling point of a substance what state will it be in?
Liquid
If the temperature is below the melting point of a substance and below the boiling point of a substance what state will it be in?
Solid
If the temperature is above the melting point of a substance and above the boiling point of a substance what state will it be in?
Gas
What is the change from a liquid to a gas called?
evaporation
What is the change from a gas to a liquid called?
condensation
What is the change from a liquid to a solid called?
freezing
Describe the arrangement of the particles in a solid
particles closely packed, in a regular arrangement
Describe the arrangement of the particles in a liquid
particles closely packed, but in a random arrangement
Describe the arrangement of the particles in a gas
particles spaced far apart in a random arrangement
A substance has a melting point of 25 C and a boiling point of 235 C. What state is it at 5 C?
Solid
A substance has a melting point of -125 C and a boiling point of -35 C. What state is it at 15 C?
Gas
A substance has a melting point of -25 C and a boiling point of 35 C. What state is it at 25 C?
Liquid
What happens to the energy of particles when a substance melts?
The particles gain energy
What happens to the movement of particles when a substance melts?
The particles are able to move around past each other
What has to happen to the forces between particles when a substance melts?
The forces are overcome by the increased energy of the particles
What happens to the energy of particles when a substance condenses?
The particles lose energy
What happens to the movement of particles when a substance condenses?
The particles move slower
What causes the particles to move closer together when a substance condenses?
The particles have less energy so the attractive forces between them pull them close together
What is the difference between a chemical change and a physical change?
Chemical changes are hard to reverse and form new substances. Physical changes are reversible and do not form any new substances. (i.e. ice and water are both made of H2O)
Sketch a heating curve and label solid, liquid, gas, melting, boiling
