P6 MOLECULES AND MATTER Flashcards
What is the equation for density?
density (p) = mass (m)/volume (V)
How do u find the volume of an irregular shape?
You will need:
-Eureka can
-250ml of water
-measuring cylinder
-object that is to be measure (eg.rock)
1)Firstly, you fill the Eureka can with 250ml of water
2)You place the measuring cylinder at the end of the nozzle once all excess water has drained out
3)Then you place the irregular object in the eureka can, water will begin to spill in the measuring cylinder. Once thats done, read the volume of water that is in the measuring cylinder after this process.
When a substance goes from gas to liquid, what is it called?
condensation
When a substance goes from liquid to solid, what is it called?
freezing
What is it called when a substance goes from solid to gas?
sublimation
What is the boiling point of water?
100 degres celsius
At what temperature does ice melt?
0 degres celsius
What is latent heat?
It is the energy transferred to a substance once it changes state
What is internal energy?
the energy stored by the particles in the substance
Give an example of internal energy?
-the kinetic energy they have due to the motion, relative to each-other
-the potential energy they have due to their positions in the substance
What happens when temperature increases in a substance?
The kinetic energy also increases
What does heating do to a substance?
It increases the internal energy by increasing the energy of its particles
What is the equation for change in energy?
△E=mc△θ
What is specific latent heat of fusion?
This is the substances energy needed for it to change state of 1kg of the substance
What is the equation for specific latent heat of fusion?
specific latent heat of fusion (L) = energy (E)/mass (m)
