Lesson 049 Learning Goal: (You should be able to…) Explain how matter changes from one state to another. Success Criteria: (Can you …) Complete the organizer about phase change

How to organize lesson 049 The lessons Agenda was: MC SA Balloon Phase change and H2O

Vocabulary Solid Liquid Gas Plasma Element Compound Homogeneous mixture Heterogeneous mixture

Write To Think 049 Log in and then … Answer the following on lined paper… List FIVE STATES of matter in order of intermolecular forces, WEAKEST first! What are the significant differences between a solid and a liquid? (At least 3!) If the particles in a liquid are free to move about … why don’t they escape like a gas? What’s the difference between a gas and plasma?

MC Answers 1 D 2 C 3 C 4 A 5 B 6 B 7 B 8 B 9 C 10 A 11 A 12 C 13 D 13 = 4 10, 11, 12 = 3 6, 7, ,8 ,9 = 2 5 OR LESS = 1

SA Written Responses Feedback Explain why salt water can be described as homogeneous mixture. Because it’s a mixture and it’s the same. Salt water is made by adding a solid compound (salt) to a liquid compound (water) and stirring. The salt will ‘disappear’ in the water and become mixed. It can become homogenous if it’s mixed enough so that all the parts of the mix are almost identical to each other. It could even be made into a solution! The salt and water can be easily separated (from the mixture) by evaporating the water, leaving the salt, which is why it’s a mixture and not a new chemical (NOT combined, JUST mixed).

SA Written Responses Feedback Explain each scientific term Elements (Aluminum, gold etc.) are NOT chemically combined Gases have an ‘indefinite or easily changed volume’ NOT ‘no volume’! ALL mixtures (hetero, homo, soln.) are easily separated.

Phase Change Diagrams During the process of heating or cooling a substance, a material's temperature will either increase (in the case of energy being added to the system) or decrease (in the case of energy being removed from the system).   Thermal (Heat Energy) Thermal (Heat Energy)

Phase Change Diagrams During the process of heating or cooling a substance, a material's temperature will either increase (in the case of energy being added to the system) or decrease (in the case of energy being removed from the system).   Thermal (Heat Energy) Thermal (Heat Energy)

Phase Change Diagrams Since this happens over a period of time, we can easily graph temperature vs. heating time and come up with something known as a phase change diagram.

Gas (Water Vapor) Liquid (Water) Solid (Ice) Heating Time Phase Change

Phase Change Diagrams However this diagram I just showed you is oversimplified. In actuallity a phase change diagram looks like this…

Heating Time Beginning of Phase Change End of Phase Change End of Phase Change What are those horizontal lines? What is happening there? gas boiling liquid melting solid Why isn’t the temperature increasing during the phase changes? Think particles! Heating Time

Heating Time Beginning of Phase Change gas boiling liquid melting End of Phase Change End of Phase Change gas boiling liquid melting solid Heating Time Particles increasing in movement Intermolecular forces being broken Particles increasing in movement Intermolecular forces being broken (particles escaping into gas) Particles increasing in movement

COOLING TIME Beginning of Phase Change gas condensing liquid freezing End of Phase Change End of Phase Change gas condensing liquid freezing solid COOLING TIME Particles decreasing in movement Particles decreasing in movement Intermolecular forces being formed Intermolecular forces being formed Particles decreasing in movement

Why do you think if we get passed the vaporization stage?

Phase Change Graphic Organizer are for terms. are for definitions of terms in your own words. one example of phase or type. Example: Description of Particles Where you describe what is happening to the particles in each direction.

End of lesson Slides after this are for teacher use if needed but were not a part of the lesson.

Multiple Choice Answers Matter that is a gas will have a definite volume. have a definite shape. be colorless. take up any shape it is put into and as much space as possible.

Multiple Choice Answers 2. If each sphere represents an atom and shades represents different types this would be an example of a(n) element compound mixture solid

Multiple Choice Answers 4. Aluminum (Al) is an example of an element compound homogenous mixture heterogeneous mixture

Multiple Choice Answers 3. If the label of a product indicates that the product has multiple ingredients in it, that suggest that the product is a(n) element compound mixture None of the above

Multiple Choice Answers 4. A solid is a state of matter that has a(n) indefinite volume and an indefinite shape. definite volume and a definite shape. definite volume and indefinite shape. indefinite volume and definite shape.

Multiple Choice Answers 5. This image shows particles of a liquid solid gas compound

Multiple Choice Answers 6. Water vapor (hydrogen and oxygen chemically joined to make something different) is an example of a(n) element compound mixture precipitate

Multiple Choice Answers 7. If each sphere represents an atom and shades represents different types this would be an example of a(n) element compound homogenous mixture heterogeneous mixture

Multiple Choice Answers 8. All mixtures are the same throughout. reasonably easy to separate. made of multiple types of compounds chemically joined together made of multiple types of elements physically mixed together.

Multiple Choice Answers 9. Water H20 and salt NaCl mixed together thoroughly is an example of a(n) element compound homogenous mixture heterogeneous mixture

Multiple Choice Answers 10. This image shows particles of a liquid solid gas compound

Multiple Choice Answers 11. How does liquid water, ice (solid), and water vapor (gas) differ from each other? they are different states or phases. they are different compounds. they are made of different kinds of elements. they are different chemicals.

Multiple Choice Answers 12. If each sphere represents an atom and shades represents different types this would be an example of elements compounds a homogenous mixture a heterogeneous mixture

Multiple Choice Answers 13. The difference between a heterogeneous mixture and a homogenous mixture is that a heterogeneous mixture is easily separated and a homogenous mixture is not. a homogenous mixture is easily separated and a heterogeneous mixture is not. heterogeneous mixture is not the same everywhere and a homogenous mixture is. homogenous mixture is not the same throughout and a heterogeneous mixture is.

Multiple Choice Answers 14. A sample like play-dough that changes shape when forced is an example of a solid. liquid. gas. all of the above.

Multiple Choice Answers 15. If each sphere represents an atom and shades represents different types this If each sphere represents an atom and shades represents different types this would be an example of a(n) element compound homogenous mixture heterogeneous mixture

Multiple Choice Answers 17. A sample that exists on the periodic table is a(n) element compound mixture gas

Multiple Choice Answers 18. This image shows particles of a liquid solid gas compound

Multiple Choice Answers 19. Examples of different type of matter are solid, liquid, gas solid, compound, mixture element, compound, gas element, compound, mixture

Multiple Choice Answers 20. Toothpaste is an example of a solid compound liquid mixture solid element liquid element

Score in Gradebook. 20 = 4 19 = 3.5 17-18 = 3 15 – 16 = 2.5 13-14 = 2 11-12 = 1.5 Below 11 = 1