Welcome of Chemistry Welcome of Chemistry Full Report on Liquid Lab Density Due!Full Report on Liquid Lab Density Due!

QuestionsQuestions

Slope for Solid Density Lab? Slope for Solid Density Lab? Bonus Points for Solid Density LabBonus Points for Solid Density Lab Element profiling Book ProjectElement profiling Book Project

18 Elements Quiz 18 Elements Quiz Finish notes on Math SkillsFinish notes on Math Skills Notes on Matter and Its PropertyNotes on Matter and Its Property

Create a graphic organizerCreate a graphic organizer Practice problemsPractice problems

Warm-UpWarm-Up

What is Matter?What is Matter?

18 Elements Quiz18 Elements Quiz

1.1. He = _________He = _________

2.2. Si = _________Si = _________

3.3. F = __________F = __________

4.4. Be = _________Be = _________

5.5. Mg = _________Mg = _________

6. Lithium = _________6. Lithium = _________

7. Sodium = 7. Sodium = ______________________

8. Chlorine = 8. Chlorine = ____________________

9. Atomic #1 = 9. Atomic #1 = ________________

10. Atomic #4 = 10. Atomic #4 = ________________

Ch. 1: Matter and Ch. 1: Matter and ChangeChange

1.2 Matter and Its Properties1.2 Matter and Its Properties

TermsTerms

MatterMatter- anything that has mass and - anything that has mass and volumevolume

AtomAtom- smallest unit of an element that - smallest unit of an element that keeps the properties of elementkeeps the properties of element

ElementElement- pure substance made of only one - pure substance made of only one type of atomtype of atom

CompoundCompound- substance made of 2 or more - substance made of 2 or more types of atoms that are chemically bondedtypes of atoms that are chemically bonded

MoleculeMolecule- type of compound in which - type of compound in which bonds are covalent bondsbonds are covalent bonds

Properties of MatterProperties of Matter

chemists use characteristic chemists use characteristic properties to tell substances apart properties to tell substances apart and to separate themand to separate them

some properties define a group of some properties define a group of substancessubstances

Types of PropertiesTypes of Properties

ExtensiveExtensive- depend on the amount of - depend on the amount of mattermatter

Ex: volume, mass, amount of energy Ex: volume, mass, amount of energy

IntensiveIntensive- do not depend on the - do not depend on the amountamount

Ex: density, boiling point, ability to Ex: density, boiling point, ability to conductconduct

Types of PropertiesTypes of Properties PhysicalPhysical- -

characteristics that characteristics that can be observed or can be observed or measured without measured without changing the changing the identity of a identity of a substancesubstance

ChemicalChemical- relates to - relates to a substances ability a substances ability to undergo changes to undergo changes that transform it into that transform it into a different substancea different substance

Easiest to see when a Easiest to see when a chemical is reactingchemical is reacting

Physical Changes in Physical Changes in MatterMatter

change in a change in a substance that substance that doesn’t change doesn’t change the identity of the identity of the substancethe substance

Ex. grinding, Ex. grinding, cutting, melting, cutting, melting, boilingboiling

Includes all changes Includes all changes of state (physical of state (physical changes of a changes of a substance from one substance from one state to another)state to another)

Solids Molecular motion?Molecular motion? Shape and volume?Shape and volume?

States of MatterStates of Matter

LiquidsLiquids Molecular motion? Molecular motion? Shape and volume?Shape and volume?

GasesGases Molecular motion Molecular motion

and spacing?and spacing? Shape and volume? Shape and volume?

PlasmaPlasma Temporary, high-energy state of Temporary, high-energy state of

moleculesmolecules Exists on the sun, in neon Exists on the sun, in neon

lights, and lightning lights, and lightning

http://www.thestormshop.com/clips.htm

How does temperature affect the state of a substance?

What is temperature?

solidsolid liquidliquid

Different substances have different melting points.

Melting

Does size affect melting point?

liquidliquid solidsolid

A substance freezes and melts at the same temperature.

Freezing

liquidliquid gasgas

Different substances have different boiling points.

Boiling

gasgas liquidliquid

Condensation and boiling occur at the same temperature.

Condensation

Why does your glass get “sweaty”?

directly from directly from

solidsolid gasgas

Can you think of something that sublimes?

Sublimation

Depositiondirectly from gas solid

Water vapor in the freezer becomes frost

Changes of StateChanges of State

Gas0

Mix Liquid

Heat

Mixture

Solid

Boiling/condensing point

Water & Steam

Water

State Change Diagram for Water

Ice & Water

Ice

intermolecular forces weakened

intermolecular forces dominate

Temperature

(K)

473

373

273

Steam

Melting/ freezing point

Chemical Changes in Chemical Changes in MatterMatter

a change in which a substance is a change in which a substance is converted into a different substanceconverted into a different substance

same as chemical reactionsame as chemical reaction doesn’t change the amount of matter doesn’t change the amount of matter

presentpresent reactantsreactants- - substances that reactsubstances that react productsproducts- - substances that are substances that are

producedproduced

mercury + iodine mercury + iodine mercuric mercuric iodideiodide

Energy Changes in Energy Changes in MatterMatter

when any change occurs, energy when any change occurs, energy is always involvedis always involved

energy can be in different forms energy can be in different forms (light, heat, etc.) (light, heat, etc.)

energy is never destroyed or energy is never destroyed or created (law of conservation of created (law of conservation of energy)energy)

Energy Changes in Energy Changes in MatterMatter

Exothermic Reaction-Exothermic Reaction- reaction that reaction that gives off energy (feels warm on gives off energy (feels warm on outside)outside)

Endothermic ReactionEndothermic Reaction- reaction that - reaction that uses up energy (feels cold on outside)uses up energy (feels cold on outside)