Matter

Question 1

What is the unit for density

Answer 1

Kg/m(3)

Question 2

What is the unit for volume

Answer 2

M(3)

Question 3

Steps on the core practical investigate the densities of solids and liquids

Answer 3

1) measure the mass of the object using a mass balance
2) fill the bottle with a liquid of a known density (e.g water)
3) place the stopped into the bottle and dry the outside
4) measure the mass of the bottle
5) empty the bottle and place the object into the density bottle. Repeat steps 2&3. Measure the mass of the bottle
6) the mass of the displaced water = the mass of the bottle - (mass of the bottle - the mass of the object)
U know the density of water, so u can use V=m/p to find the volume displaced = volume of object
7) calculate the density of the object using the equation with the mass measured in step 1 and the volume calculated in step 6

Question 4

What are the difference in density between the different states of matter

Question 5

What happens to mass when substances melt, freeze, evaporate, boil, condense of sublimate

Answer 5

Mass is conserved

Question 6

How does heating a system change the energy stored within the system and raise its temp or produce changes of state

Answer 6

When u heat a liquid, the extra energy is transferred into the particles’ kinetic energy stores, making them move faster, when enough of the particles have enough energy to overcome their attraction to each other, big bubbles of gas for, in the liquid -boil

Question 7

What is specific heat capacity

Question 8

What is specific latent heat

Question 9

What’s the difference between specific heat capacity and specific latent capacity

Question 10

What is the unit for specific heat capacity

Answer 10

J/kg °c

Question 11

What is the unit for specific latent heat

Answer 11

J/kg

Question 12

How can you reduce unwanted energy transfer through thermal insulation

Question 13

Steps of the core practical investigate the properties of water by determining the specific heat capacity of water and obtaining a temperature-time graph for melting ice

Question 14

Explain the pressure of a gas in terms of the motion of its particles

Question 15

Explain the effect of changing the temp of a gas on the velocity of its particles and hence on the pressure produced by a fixed mass of a gas at a constant volume

Question 16

What does absolute zero mean (-273°c)