What does kinetic energy make particles do
Move faster in gases and liquids /vibrate more in solids
What is the unit of heat energy
Joule
What is temperature a measure of
The average kinetic energy of th
...
What does kinetic energy make particles do
Move faster in gases and liquids /vibrate more in solids
What is the unit of heat energy
Joule
What is temperature a measure of
The average kinetic energy of the particles in a substance
How to make the rate of cooling faster
The greater the difference in temperature between objects
How to make energy flow between places
If there's a difference in temperature between the two places
What holds particles close together in a solid
Strong forces of attraction between particles
Why are solids dense
Particles are close together so they don't take up much space
How are strong are forces of attraction between liquids
Weaker then solids
How does the amount of energy compare in solids compared to liquids
More energy
How does the amount of energy in gases compare to liquids and solids
Even more energy
How does boiling occur
Big bubbles of gas form when particles have enough energy to overcome their attraction to eachother
What are melting and boiling points affected by
Impurities
When melting or boiling, what is the energy used for
Breaking intermolecular bonds
When substances are condensing or freezing what happens to energy and temp
It's released and temp doesnot go down till all the substance is liquid/solid
What happens to most substances when heated
Expand and volume increases
What does conduction mainly occur in
Solids
What happens when one particle vibrates in solids
Bumps into others and passes vibration on
What is conduction of heat
Vibrating particles pass know extra ke to neighbouring particles
Why do metals conduct heat well
Free electrons inside metal
Why are non metals good at insulating
Don't have free electrons
What factors effect the rate of conduction
Material, state of the material, surface area, temp difference
How does surface area effect the rate of conduction
Larger means more room for collisions
What's the relationship between resistance, voltage and current
I=V/R
What's the relationship between mass, acceleration and force
F=ma
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