States of MatterStates of Matter

Day 4Day 4

CurriculumCurriculum

• Big Idea: Big Idea: Changes in matter are Changes in matter are accompanied by changes in energy.accompanied by changes in energy.

• Competency: Demonstrate how changes in Competency: Demonstrate how changes in matter are accompanied by changes in matter are accompanied by changes in energy.energy.

PA Standard 3.2.C.A3:PA Standard 3.2.C.A3: Describe the three Describe the three normal states of matter in terms of energy, normal states of matter in terms of energy, particle motion, and phase transitions.particle motion, and phase transitions.

Today’s AgendaToday’s Agenda

• OpenerOpener: How does the size of a substance affect if it is a solid, : How does the size of a substance affect if it is a solid, liquid, or gas at room temperature?liquid, or gas at room temperature?

• ReviewReview the last investigation the last investigation• Investigate TodayInvestigate Today: Discover the affect of molecular POLARITY : Discover the affect of molecular POLARITY

on states of matter (see unit 1.5: Solid, Liquid, or Gas? on states of matter (see unit 1.5: Solid, Liquid, or Gas? Packet).Packet).1. 1. Build modelsBuild models of molecules assigned by your teacher. of molecules assigned by your teacher.3. Discover how a molecule’s SHAPE (POLARITY) affects its 3. Discover how a molecule’s SHAPE (POLARITY) affects its state of matter at room temperature. state of matter at room temperature. Use models, diagrams, Use models, diagrams, and tables to see multiple representationsand tables to see multiple representations of how polarity of how polarity affects physical state.affects physical state.

• ReadRead the Chem Talk Handout, and answer the “Chemistry to the Chem Talk Handout, and answer the “Chemistry to Go” Questions Go” Questions in small groupsin small groups..

• ClosureClosure: Discuss answers : Discuss answers as a classas a class..Take Home AssignmentTake Home Assignment: Quiz tomorrow on states of matter. : Quiz tomorrow on states of matter.

Answer the review questions on the following slides.Answer the review questions on the following slides.

Which state’s particles are the Which state’s particles are the smallest?smallest?

Which state’s particles have the lowest Which state’s particles have the lowest average kinetic energy?average kinetic energy?

Which state’s particles have the Which state’s particles have the greatest average velocity?greatest average velocity?

Contrast kinetic energy and potential Contrast kinetic energy and potential energyenergy

Define SublimationDefine Sublimation

Give an example of a substance that Give an example of a substance that sublimes.sublimes.

What is the normal boiling point of What is the normal boiling point of water?water?

How is the normal boiling point of How is the normal boiling point of water different than the temperature water different than the temperature at which water boils?at which water boils?

How does pressure affect boiling How does pressure affect boiling point?point?

What is the normal melting point of What is the normal melting point of water?water?

Draw the heating curve of water, Draw the heating curve of water, labeling the following:labeling the following:

• Melting pointMelting point

• Boiling pointBoiling point

• SolidSolid

• LiquidLiquid

• GasGas

Label the places on the heating curve Label the places on the heating curve where the kinetic energy changeswhere the kinetic energy changes

Label the places on the heating curve Label the places on the heating curve where the potential energy changes.where the potential energy changes.

Does temperature change during a Does temperature change during a change in state?change in state?

What is the change of state when a What is the change of state when a gas changes into a solid without gas changes into a solid without going through the liquid phase.going through the liquid phase.

When the outside of your glass of ice When the outside of your glass of ice water becomes wet when you take water becomes wet when you take the glass of water outside, where is the glass of water outside, where is the water on the outside of the glass the water on the outside of the glass coming from?coming from?

What change in state is taking place in What change in state is taking place in the previous question?the previous question?

Contrast a polar molecule with a Contrast a polar molecule with a nonpolar moleculenonpolar molecule

How does polarity affect state?How does polarity affect state?

How does the size of particles affect How does the size of particles affect state?state?

Is the state of a substance a physical Is the state of a substance a physical property or a chemical property? property or a chemical property? Why?Why?

Give an example of a polar molecule.Give an example of a polar molecule.

Give an example of a nonpolar Give an example of a nonpolar molecule.molecule.

How does the temperature of a gas How does the temperature of a gas affect its volume?affect its volume?