the particle model of matter-phy3

Question 1

what is the definition of specific latent heat of fusion?

Answer 1

it is the amount of energy required to change the state of 1kg of substance from solid to liquid without changing its state

Question 2

structure of solids:

Answer 2

particles are linked by strong forces
packed close together and move very little
specific and regular pattern

Question 3

the temperature in which a solid turns into a liquid

Answer 3

melting point

Question 4

the temperature in which a liquid turns into a gas

Answer 4

boiling point

Question 5

density

Answer 5

mass/volume

Question 6

the density of solids

Answer 6

solids have the highest density as the particles are close together

Question 7

the density of gases

Answer 7

gases have the lowest density as the particles are far apart

Question 8

condensation:

Answer 8

gas to liquid

Question 9

particles of gases-temperature

Answer 9

the higher the temperature the higher the average kinetic energy of the particles

Question 10

how to determine the density of a regular objects

Answer 10

1.first determine the mass by using a balance
2.to work out the volume of the cube, use a ruler to measure the length of each side
3. then use the equation of mass/volume to work out the density

Question 11

how to determine the density of irregular objects

Answer 11

1.first determine the mass by using a balance
2.fill the Eureka can with water
3.place the object into the water. this will cause water to be displaced and flow out the can through the spout
4.measure the volume of water which has been displaced-same volume as object

Question 12

why is the total positive charge of any element always the same?

Answer 12

it is because the positive charge is provided by the protons

every atom of the same element has the same number of protons