Heat Temperature and Thermal Energy Thermal Energy Total

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Heat, Temperature, and Thermal Energy

Heat, Temperature, and Thermal Energy

Thermal Energy • Total potential and kinetic energy associated with the random motion and

Thermal Energy • Total potential and kinetic energy associated with the random motion and arrangement of the particles of a material! –Not concerned with the kinetic energy of the object itself!!

Heat • Thermal Energy that is absorbed, given up, or transferred from one substance

Heat • Thermal Energy that is absorbed, given up, or transferred from one substance to another. – It is thermal energy on the move!!

Temperature • Measure of the average kinetic energy of the particles in a sample

Temperature • Measure of the average kinetic energy of the particles in a sample of matter!! I thought temperature was how hot or cold it is? Well, It is sort of……

Relationship between Heat and o Temperature: e d i V o e Vid Which

Relationship between Heat and o Temperature: e d i V o e Vid Which beaker is hotter? Which beaker gives off more heat? 80 o. C Which could melt more ice? Temperature is the same, amount of heat is different!!

Which has a higher temperature? 10 o. C 30 o. C A B 50

Which has a higher temperature? 10 o. C 30 o. C A B 50 o. C 80 o. C C D

Which gives off more heat? 10 o. C A 10 o. C B 10

Which gives off more heat? 10 o. C A 10 o. C B 10 o. C C 10 o. C D

Relate heat and temperature ? • Is it possible for an object to be

Relate heat and temperature ? • Is it possible for an object to be at a high temperature, and give off little heat? Thimble full of really hot water!!!

Relate heat and temperature ? • Is it possible for an object to be

Relate heat and temperature ? • Is it possible for an object to be at a high temperature, and give off lots of heat?

Relate heat and temperature ? • Is it possible for an object to be

Relate heat and temperature ? • Is it possible for an object to be at a low temperature, and give off little heat?

Relate heat and temperature • Is it possible for an object to be at

Relate heat and temperature • Is it possible for an object to be at a low ? temperature, and give off lots of heat?

Relate Heat and Temperature • When a substance is “hot”, it has more thermal

Relate Heat and Temperature • When a substance is “hot”, it has more thermal energy that when it is cold! • Temperature is a measure of the ability to give up heat to and absorb heat from another substance!!

The temperature of a “spark” is about 2000 o. C. That is HOT!!!!! How

The temperature of a “spark” is about 2000 o. C. That is HOT!!!!! How much thermal energy does a spark have? How much heat can it “give off”!!

Heat Flow • Heat always flows from a substance with a high temperature to

Heat Flow • Heat always flows from a substance with a high temperature to a substance with a low temperature even if lower temperature substance has more thermal energy!!

What do these 2 pictures have in common? Heat flow from higher to lower!!!!!

What do these 2 pictures have in common? Heat flow from higher to lower!!!!!

Which direction will heat flow? A. A to B B. B to A C.

Which direction will heat flow? A. A to B B. B to A C. Neither D. Both A to B and B to A

How do you change the temperature of a substance? • You change the temperature

How do you change the temperature of a substance? • You change the temperature of a substance by either adding heat(raise temperature) or by removing heat(lower temperature)!!!

In which choice will heat flow fastest from Y to X? A B C

In which choice will heat flow fastest from Y to X? A B C D

In which choice will heat flow fastest from X to Y? A B C

In which choice will heat flow fastest from X to Y? A B C D

Specific Heat • Heat required to change the temperature of a substance. • Different

Specific Heat • Heat required to change the temperature of a substance. • Different substances have different specific heats. – They conduct heat at different rates!! – Consider Sand Water!!! – Think about the beach! – Land breezes and Sea breezes!! o Vide

Specific Heats of some common substances: Substance Specific Heat in J/g o. C Water

Specific Heats of some common substances: Substance Specific Heat in J/g o. C Water Iron Lead Silver Copper Aluminum 4. 18. 450. 13. 245. 390. 900

The higher the specific heat, the more heat required to change temperature!! Things with

The higher the specific heat, the more heat required to change temperature!! Things with high specific heats take a long time to heat up and a long time to cool down!! Things with a low specific heat, get Hot fast, but also cool fast!!

P. 163 # 1 -5 In Notebook Notetaking Skills Worksheet

P. 163 # 1 -5 In Notebook Notetaking Skills Worksheet