Particle model of matter-PAPER 1

Question 1

What are the properties of solid?

Answer 1

Solid are incompressible because there no gaps between them
particles are in a fixed pattern
fixed size and shape

Question 2

What is the other method to find out the density for irregular solid?

Answer 2

1) Record height of water in measuring cylinder and the mass of the solid
2) Add the solid being tested to measure the cylinder
3) Record new height in the cylinder
4) original height - new height gives the volume of the solid being tested
5) Calculate the density

Question 3

What happens when a temperature of a substance increases?

Answer 3

total kinetic energy of the particle increase

Question 4

What happens when the physical state of substance changes?

Answer 4

total potential energy of the particles change

Question 5

What is latent heat of fusion?

Answer 5

when a solid is heated at its melting point its temperature doesn’t change heat but the state does to a liquid
latent heat of fusion-energy supplied and the energy required to break the bonds

Question 6

What is the latent heat of vaporization?

Answer 6

When a liquid is heated at its boiling point, its temperature does not change the state does to a vapour state

latent heat of vaporization- heat energy supplied and is the energy required to break the weak bonds between particles in the liquid

Question 7

What is the difference of latent heat vaporization and fusion?

Answer 7

vaporization-liquid to gas

fusion-solid to liquid

Question 8

What is the energy for a change of state equation?

Answer 8

energy for a change of state=mass x specif latent heat

Question 9

What are the properties of a liquid?

Answer 9

incompressible because there no gaps between them

fixed size but contain particles that are free to move allowing them to change shape to fit the container

Question 10

What is a gas?

Answer 10

large gaps between particles making them compressible

can change size and shape

Question 11

What is density?

Answer 11

density=mass/volume

Question 12

What is the independent variable?

Answer 12

-material being tested

Question 13

What is the dependent variable?

Answer 13

volume and mass

Question 14

What is the control variable?

Answer 14

temperature

Question 15

What is the first step to measure the density of a regular shaped object?

Answer 15

measure the length width and height

calculate the volume=length x width x height

Question 16

What do you do after finding the volume of a regular object?

Answer 16

measure the mass using a balance
calculate density=mass/volume
and then repeat for two more objects

Question 17

What are the first step to calculate the density of an irregular object?

Answer 17

fill the displacement can with water

then measure and record the mass of the solid

Question 18

What do you do after measuring the mass for an irregular solid?

Answer 18

then place the solid in the can and make sure it is fully submerged into the water
then get a measuring cylinder and catch the water that comes out from the spout

Question 19

What are the final steps for irregular solid?

Answer 19

record the volume
calculate the density
repeat this twice and get a mean