Solids,Liquids, And Gases

Question 1

What is density

Answer 1

Relates the mass of a substance to how much space it takes up

Question 2

How can you find the density of an object from its mass and volume

Answer 2

If its a box shape, measure its length, width, and height and calculate its volume
For an irregular solid, submerge it in a eureka can filled with water, the water displaced by the object will be transferred to the measuring cylinder
The volume of water in the cylinder is equal to the volume of the solid
Use a balance to measure the objects mass

Question 3

What is the pressure

Answer 3

A measure of the force being applied to the surface of something

Question 4

How can you obtain a temperature-time graph for water

Answer 4

Fill a beaker with crushed ice, use a thermometer to record the temperature of the ice
Use the Bunsen burner to gradually heat the beaker
Every 20 seconds record the temperature of the beaker, continue this until the water starts to boil
Plot a graph of temperature against time

Question 5

What is absolute zero

Answer 5

The coldest anything can get, 0 Kelvins or -273 degrees Celsius

Question 6

What is the conversion of degrees Celsius into Kelvins

Answer 6

+273

Question 7

What does particle theory state

Answer 7

Gases consist of very small particles which are constantly moving in completely random directions
The temperature of a gas is proportional to the average energy in the kinetic energy stores of its particles

Question 8

What does particle theory say colliding gas particles cause

Answer 8

If you heat a gas, they will have more energy in their kinetic energy stores and will have more frequent collisions, causing an increase in force as well as pressure
Decreasing a volume will increase the pressure while increasing the area will decrease pressure

Question 9

What is specific heat capacity

Answer 9

The energy required to change the temperature of an object by 1 degree Celsius per kilogram of mass

Question 10

How can you find the specific heat capacity of water

Answer 10

Use a mass balance to measure the mass of the insulating container
Fill the container with water and measure the mass again, the difference between masses is the mass of the water
Connect a joulemeter
Measure the temperature of the water before turning on the power
When the temperature reaches 10 degrees Celsius switch off the power and record the temperature increase as well as the energy on the joulemeter
Repeat the whole experiment at least 3 times then calculate the average specific heat capacity by rearranging the formula