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Changes of State
Terms
Density
State of Matter
Miscellaneous
100
How many changes of state are there?
6
100
Define displacement.
Displacement is the amount of space that an object takes up when placed in a fluid
100
What does density have to do with fluids and affect how they interact with each other?
all fluids have different densities causing them to separate if mixed together depending on whether its denser or less dense
100
Define volume and is it usually measured in?
Volume is the amount of space taken up by a substance or object and it is usually measured in millilitres, litres or cubic centimetres.
100
The liquid state of a substance is usually less dense than the solid state of the same substance. But there is one type of substance that does not follow this rule. Name this substance and give an example.
The substance that does not follow this rule is water. For example, when water turns into ice, you notice that it floats when you put it on a glass full of water because it's particles are farther spaced out making the ice cube less dense
200
What is the difference between condensation and evaporation?
Condensation is the change of state of a substance from a gas form to liquid form and evaporation is the change of state of a substance from liquid to gas form.
200
Define fluid(s)
Any state of matter that flows
200
What is the formula for finding density?
D = m รท v
200
Matter is anything that...?
Matter is anything that has mass and volume.
200
Is heat added or released when a substance changes from liquid to gas?
Heat is released.
300
What happens to a block of ice when the temperature rises?
The particles will become more energetic which causes them to move farther apart. If enough energy is added, the ice will melt.
300
What is mass? What is it measured in?
Mass is the quantity of matter that a substance or object contains. g/kg
300
An eraser is dropped into a full cup of water and causes 50 mL of water is displaced. The mass of the eraser is 200 g. Calculate the density of the eraser in g/cm3.
D= M / V = 200 g / 50 cm3 D= 4 g/cm3
300
What kind of particles is matter made of?
Atoms and molecules.
300
What is kinetic energy?
Kinetic energy is the energy of motion.
400
Which of the following is not an example of matter? a)solids b)oxygen c)heat d)water
Heat is not an example of matter.
400
What is matter?
Matter is anything that has mass and volume
400
What is a useful technique you could use to compare densities?
Layering.
400
What is the difference between temperature and thermal energy?
Temperature is the average kinetic energy of its particles while thermal energy is the total amount of energy.
400
What is the density of a piece of wood that has a mass of 25.0 g and a volume of 29.4 cm3?
D= M/V = 25.0/ 29.4 cm3 =0.850 g/cm3
500
Name all the changes of state and their switching form (e.g. liquid to solid)
Melting: solid to liquid, Evaporation: liquid to gas, Condensation: gas to liquid , Solidification: liquid to solid, Sublimation: solid to gas, Deposition: gas to solid
500
What is volume? What is it measured in?
Volume is the amount of space taken up by a substance or object. Cubic centimetres/ mL
500
Calculate the density, 500 g cube with the following dimensions: length=8, width=6, height=5. Explain whether this cube will float on water (1.00 g) or not.
D= M/V = 500 g / 240 cm3 =2.08 g/cm3 No, this cube will not float on water because it is denser than the water itself.
500
State all the 3 points of the kinetic molecular theory.
1. All matter is made up of very small particles. 2. There is empty space between particles. 3. Particles are constantly moving. The particles are colliding with each other and the walls of their container.
500
If the density of a basketball is 50 g/cm3 and the mass is 150 g what is the volume?
Volume= M/D =150g / 50g/cm3 =3 cm3