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Copyright 2011 CreativeChemistryLessons.com

DO YOU REMEMBER?DO YOU REMEMBER?

• Temperature is the measure of Temperature is the measure of how how HOTHOT or or COLDCOLD something something is.is.

• Temperature is the measure of Temperature is the measure of the particles the particles KINETIC KINETIC ENERGYENERGY..

• Temperature is the measure of Temperature is the measure of how how HOTHOT or or COLDCOLD something something is.is.

• Temperature is the measure of Temperature is the measure of the particles the particles KINETIC KINETIC ENERGYENERGY..

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TEMPERATURE IS THE MEASURETEMPERATURE IS THE MEASUREOF HOW FAST PARTICLES ARE OF HOW FAST PARTICLES ARE

MOVING (KINETIC ENERGY)MOVING (KINETIC ENERGY)


CAN YOU FIGURE IT OUT?CAN YOU FIGURE IT OUT?

• Is it true that ____ not real?Is it true that ____ not real?

• Loss of ____ is what I feel.Loss of ____ is what I feel.

• _____ will move you need _____ will move you need to know.to know.

• _____ will flow from ____ to _____ will flow from ____ to ____.____.

• Is it true that ____ not real?Is it true that ____ not real?

• Loss of ____ is what I feel.Loss of ____ is what I feel.

• _____ will move you need _____ will move you need to know.to know.

• _____ will flow from ____ to _____ will flow from ____ to ____.____.

BrainPop Diffusion Video

cold’scold’s

heatheat

HeatHeat

lowHeatHeat highhigh

Frío No ExisteFrío No Existe


Do you know?Do you know?

ExplainExplain


DIFFUSION AND HEATDIFFUSION AND HEAT

• DiffusionDiffusion is the is the random motion random motion that that causes particles to causes particles to spread outspread out..

• A A differencedifference of high to low is called a of high to low is called a gradientgradient, when it’s balanced it’s called , when it’s balanced it’s called equilibriumequilibrium..

• DiffusionDiffusion causes causes solutes to dissolve solutes to dissolve without stirring.without stirring.

• DiffusionDiffusion causes causes heat to travel heat to travel from from areas of areas of highhigh temperature to areas of temperature to areas of lowlow temperature. temperature.

• DiffusionDiffusion is the is the random motion random motion that that causes particles to causes particles to spread outspread out..

• A A differencedifference of high to low is called a of high to low is called a gradientgradient, when it’s balanced it’s called , when it’s balanced it’s called equilibriumequilibrium..

• DiffusionDiffusion causes causes solutes to dissolve solutes to dissolve without stirring.without stirring.

• DiffusionDiffusion causes causes heat to travel heat to travel from from areas of areas of highhigh temperature to areas of temperature to areas of lowlow temperature. temperature.

BrainPop Diffusion Video


HEAT WILL FLOW…

FROM HIGHTO LOW

Thermochemistry Video

IS IT TRUE THAT COLD’S NOT REAL?

LOSS OF HEAT IS WHAT I FEELHEAT WILL MOVE YOU NEED TO KNOW


HEAT FLOWHEAT FLOW

• Heat will only flow from an Heat will only flow from an area of area of HIGH TEMPHIGH TEMP to an to an area of area of LOW TEMPLOW TEMP

• Heat will only flow from an Heat will only flow from an area of area of HIGH TEMPHIGH TEMP to an to an area of area of LOW TEMPLOW TEMP

HIGHTEMP

LOWTEMP



HEAT FLOWHEAT FLOW

• Use these pieces to describe the following heat situations.

• Use these pieces to describe the following heat situations.

HIGHTEMP

LOWTEMP

HEAT FLOWS IN

HEAT FLOWS OUT



150°C

SITUATION 1SITUATION 1

• Put the juice box in the oven.• Put the juice box in the oven.

HIGHTEMP

25°C LOWTEMP

HEAT FLOWS IN



150°C


• Put the frozen OJ in the oven.• Put the frozen OJ in the oven.

HIGHTEMP

-5°C LOWTEMP

HEAT FLOWS IN



150°C


• Put the coffee in the oven.• Put the coffee in the oven.

200°C

LOWTEMP

HEAT FLOWS OUTHIGHTEMP


DO YOU ALREADY KNOW?

• How does a refrigerator work to How does a refrigerator work to keep food cold?keep food cold?

• Which gas law do fridges use?Which gas law do fridges use?

Play Fridge Video Play Miele Fridge Video

HEAT FLOWHEAT FLOW

LOWTEMP

HIGHTEMP

HEAT

OUT

HEAT

OUT

HIGHTEMP

LOWTEMP

HEAT OUT

HEAT OUT


HOW REFRIGERATORS WORKHOW REFRIGERATORS WORK

• A fridge A fridge absorbsabsorbs the heat out of the heat out of food and food and releasesreleases it out the back. it out the back.

• Refrigerators use the Refrigerators use the Combined Combined Gas LawGas Law to create lower to create lower temperatures.temperatures.

• Increase the volumeIncrease the volume, the , the pressure pressure will decrease will decrease and the and the temperature temperature will decrease will decrease also.also.

• A fridge A fridge absorbsabsorbs the heat out of the heat out of food and food and releasesreleases it out the back. it out the back.

• Refrigerators use the Refrigerators use the Combined Combined Gas LawGas Law to create lower to create lower temperatures.temperatures.

• Increase the volumeIncrease the volume, the , the pressure pressure will decrease will decrease and the and the temperature temperature will decrease will decrease also.also.

TT

CombinedCombined

PP



5°C


• Put the juice box in the fridge.• Put the juice box in the fridge.

25°C

LOWTEMP

HEAT FLOWS OUT

HIGHTEMP



5°C


• Put the frozen OJ in the fridge.• Put the frozen OJ in the fridge.

-5°C

LOWTEMP

HIGHTEMP

HEAT FLOWS IN



5°C


• Put the coffee in the fridge.• Put the coffee in the fridge.

200°C

LOWTEMP

HEAT FLOWS OUT

HIGHTEMP


Candy Video

HEAT FLOW

ENDO = INENDO = IN EXO = OUTEXO = OUT

RELEASERELEASEABSORBABSORB

Temperature Curve of Water

Heat (J)

Tem

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ture

(°C

)140

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120

110

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90

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60

50

40

30

20

10

0

-10

-20

-30

-400 1 2 3 4 5 6 7 8 9 10

MELTING

VAPORIZATION

ENDOTHERMIC

MELTINGPOINT

BOILINGPOINT



Heat (J)

Tem

pera

ture

(°C

)140

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

-400 1 2 3 4 5 6 7 8 9 10

FREEZING

CONDENSATION

EXOTHERMIC

FREEZINGPOINT

CONDENSINGPOINT


Heat Added (kJ)

Tem

pera

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)140

130

120

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-40

ENDOTHERMICENDOTHERMIC

EXOTHERMIC

MELTINGPOINT

BOILINGPOINT

LIQUID

VAPOR

SOLID

MELTINGMELTING

VAPORIZATIONVAPORIZATION

CONDENSATIONCONDENSATION

FREEZINGFREEZING


Heat Added (kJ)

Tem

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ture

(°C

)140

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

-40


EXOTHERMIC

MELTINGPOINT

BOILINGPOINT

LIQUID

VAPOR

SOLID

MELTINGMELTING



FREEZINGFREEZING

States of Water Video


Did You Learn It?Did You Learn It?

• What does EXOTHERMIC mean?A. EXO means inB. EXO means out

• What does EXOTHERMIC mean?A. EXO means inB. EXO means out




• When a liquid turns into a solid, it is called…A. freezingB. condensationC. vaporizationD. melting

• When a liquid turns into a solid, it is called…A. freezingB. condensationC. vaporizationD. melting

????




• During freezing...1. Energy is absorbed2. Energy is released

• During freezing...1. Energy is absorbed2. Energy is released

????ABSORBABSORBABSORBABSORB RELEASERELEASERELEASERELEASE



FREEZING (FUSION)FREEZING (FUSION)

• Going from a liquid to a solid is called Going from a liquid to a solid is called freezing, or fusionfreezing, or fusion..

• The particles The particles release (lose) energyrelease (lose) energy..• ReleasingReleasing energy causes particles to energy causes particles to

slow downslow down..

• Going from a liquid to a solid is called Going from a liquid to a solid is called freezing, or fusionfreezing, or fusion..

• The particles The particles release (lose) energyrelease (lose) energy..• ReleasingReleasing energy causes particles to energy causes particles to


RELEASEENERGY

RELEASEENERGY




• What does ENDOTHERMIC mean?A. ENDO means outB. ENDO means in

• What does ENDOTHERMIC mean?A. ENDO means outB. ENDO means in




• When a liquid turns into a gas, it is called…A. freezingB. condensationC. vaporizationD. melting

• When a liquid turns into a gas, it is called…A. freezingB. condensationC. vaporizationD. melting

????




• During vaporization...1. Energy is absorbed2. Energy is released

• During vaporization...1. Energy is absorbed2. Energy is released




BOILING (VAPORIZATION)BOILING (VAPORIZATION)

• Going from a liquid to a gas is called Going from a liquid to a gas is called boiling or vaporizationboiling or vaporization..

• The particles The particles absorb (gain) energyabsorb (gain) energy..• AbsorbingAbsorbing energy causes particles to energy causes particles to

speed upspeed up..

• Going from a liquid to a gas is called Going from a liquid to a gas is called boiling or vaporizationboiling or vaporization..


speed upspeed up..

ABSORBABSORBENERGYENERGYABSORBABSORBENERGYENERGY




• When a solid turns into a liquid, it is called…A. freezingB. condensationC. vaporizationD. melting

• When a solid turns into a liquid, it is called…A. freezingB. condensationC. vaporizationD. melting

????




• During melting...1. Energy is absorbed2. Energy is released

• During melting...1. Energy is absorbed2. Energy is released




MELTINGMELTING

• Going from a solid to a liquid is called Going from a solid to a liquid is called meltingmelting..


speed upspeed up..

• Going from a solid to a liquid is called Going from a solid to a liquid is called meltingmelting..


speed upspeed up..





• When a vapor turns into a liquid, it is called…A. freezingB. condensationC. vaporizationD. melting

• When a vapor turns into a liquid, it is called…A. freezingB. condensationC. vaporizationD. melting

????




• During condensation...1. Energy is absorbed2. Energy is released

• During condensation...1. Energy is absorbed2. Energy is released





• Going from a gas to a liquid is called Going from a gas to a liquid is called condensingcondensing..

• The particles releaseThe particles release (lose) energy(lose) energy..• ReleasingReleasing energy causes particles to energy causes particles to


• Going from a gas to a liquid is called Going from a gas to a liquid is called condensingcondensing..

• The particles releaseThe particles release (lose) energy(lose) energy..• ReleasingReleasing energy causes particles to energy causes particles to


RELEASEENERGY

RELEASEENERGY




• When a solid turns into a vapor, it is called…A. vaporizationB. condensationC. sublimationD. melting

• When a solid turns into a vapor, it is called…A. vaporizationB. condensationC. sublimationD. melting

????




• During sublimation...1. Energy is absorbed2. Energy is released

• During sublimation...1. Energy is absorbed2. Energy is released




SUBLIMATIONSUBLIMATION

• Going from a solid to a gas is called Going from a solid to a gas is called sublimationsublimation..


speed upspeed up..

• Going from a solid to a gas is called Going from a solid to a gas is called sublimationsublimation..


speed upspeed up..




Heat Added (kJ)

Tem

pera

ture

(°C

)140

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

-40


EXOTHERMIC

MELTINGPOINT

BOILINGPOINT

LIQUID

VAPOR

SOLID

MELTINGMELTING



FREEZINGFREEZING

SUBLIMATIO

N

SUBLIMATIO

N



• As ice As ice meltsmelts or or freezesfreezes, , the temperature does the temperature does not change.not change.

• TRUETRUE, the energy, the energyis used to breakis used to breakthe bonds.the bonds.

• As ice As ice meltsmelts or or freezesfreezes, , the temperature does the temperature does not change.not change.

• TRUETRUE, the energy, the energyis used to breakis used to breakthe bonds.the bonds.



Heat Added (kJ)

Tem

pera

ture

(°C

)140

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

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-40

No Temp ChangeBond Breaking

MELTINGMELTING

FREEZINGFREEZING

No Temp ChangeBond Forming



• As water As water vaporizesvaporizes or or condensescondenses, the , the temperature increases.temperature increases.

• FALSEFALSE, the energy, the energyis used to breakis used to breakbonds, so the tempbonds, so the tempdoesn’t change.doesn’t change.

• As water As water vaporizesvaporizes or or condensescondenses, the , the temperature increases.temperature increases.

• FALSEFALSE, the energy, the energyis used to breakis used to breakbonds, so the tempbonds, so the tempdoesn’t change.doesn’t change.



Heat Added (kJ)

Tem

pera

ture

(°C

)140

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

-40



MELTINGMELTING

FREEZINGFREEZING

No Temp ChangeBond Breaking

No Temp ChangeBond FormingMELTINGMELTING

FREEZINGFREEZING


ENDOTHERMIC REACTIONENDOTHERMIC REACTION

• Energy is Energy is absorbedabsorbed by reactionby reaction• HEATHEAT is a reactant (is a reactant (left sideleft side))• NHNH44NONO3 3 + H+ H22O + O + HEAT HEAT NHNH44

+ + + NO+ NO33--

• Energy is Energy is absorbedabsorbed by reactionby reaction• HEATHEAT is a reactant (is a reactant (left sideleft side))• NHNH44NONO3 3 + H+ H22O + O + HEAT HEAT NHNH44

+ + + NO+ NO33--

LOWTEMP

HIGHTEMP

HEAT FLOWThermochemistry Video


Energy Diagram

Reaction Progress

Pot

entia

l Ene

rgy

reactant

product


ABSORBABSORBABSORBABSORB RELEASERELEASERELEASERELEASE


EXOTHERMIC REACTIONSEXOTHERMIC REACTIONS

• Energy is Energy is releasedreleased by reaction by reaction• HEAT HEAT is a product (is a product (right sideright side))• NaClONaClO3 3 NaCl + ONaCl + O2 2 + + HEATHEAT

• Energy is Energy is releasedreleased by reaction by reaction• HEAT HEAT is a product (is a product (right sideright side))• NaClONaClO3 3 NaCl + ONaCl + O2 2 + + HEATHEAT

Play Gummi Bear Video

Play Flaming Gummi Bear Video

LOWTEMP

HIGHTEMP

HEAT FLOW



Energy Diagram

Reaction Progress

Pot

entia

l Ene

rgy

reactant

productEXOTHERMICEXOTHERMIC

ABSORBABSORBABSORBABSORB RELEASERELEASERELEASERELEASE


ENERGY GRAPHSENERGY GRAPHS

• The The productsproducts in an in an endothermicendothermic reactions have reactions have higher energy higher energy because because energy was absorbedenergy was absorbed..

• HeatHeat is a is a reactant (left side)reactant (left side) in in endothermicendothermic reactions. reactions.

• The The productsproducts in an in an exothermicexothermic reaction have a reaction have a lower energy lower energy because because energy was releasedenergy was released..

• HeatHeat is a is a product (right side)product (right side) in in exothermicexothermic reactions. reactions.

• The The productsproducts in an in an endothermicendothermic reactions have reactions have higher energy higher energy because because energy was absorbedenergy was absorbed..

• HeatHeat is a is a reactant (left side)reactant (left side) in in endothermicendothermic reactions. reactions.

• The The productsproducts in an in an exothermicexothermic reaction have a reaction have a lower energy lower energy because because energy was releasedenergy was released..

• HeatHeat is a is a product (right side)product (right side) in in exothermicexothermic reactions. reactions.

How a Catalyst Works Thermochemistry Video


Energy Diagram

Reaction Progress

Pot

entia

l Ene

rgy

reactant

productEXOTHERMICEXOTHERMIC

Can I speed upthe reaction?

Add a CatalystAdd a Catalyst

Lowers Activation

Energy

Lowers Activation

Energy

Energy Diagram

Reaction Progress

Pot

entia

l Ene

rgy

reactant

product


Can I speed upthe reaction?

Add a CatalystAdd a CatalystLowers Activation

Energy

Lowers Activation

Energy


CATALYSTSCATALYSTS

• You can You can speed up speed up a reaction by a reaction by adding a adding a catalystcatalyst..

• CatalystsCatalysts lowerslowers the the activationactivation energy energy (energy to get the reaction started).(energy to get the reaction started).

• Your body uses Your body uses catalystscatalysts called called enzymesenzymes to to break down food break down food faster.faster.

• CatalystsCatalysts are written are written above the arrowabove the arrow in a reaction.in a reaction.

• You can You can speed up speed up a reaction by a reaction by adding a adding a catalystcatalyst..

• CatalystsCatalysts lowerslowers the the activationactivation energy energy (energy to get the reaction started).(energy to get the reaction started).

• Your body uses Your body uses catalystscatalysts called called enzymesenzymes to to break down food break down food faster.faster.

• CatalystsCatalysts are written are written above the arrowabove the arrow in a reaction.in a reaction.

How a Catalyst Works Hydrogen Peroxide & Yeast

do you remember?

Documents

brainpop diffusion videoheat

areas of low temperature

areas of high temperature

loss of heat

following heat situations

area of high temp

juice box

difference of high