Do NowWednesday, January 8,

2014Write a definition for the following words:• heat• temperature

3.5 minutesDo Now Check

By the end of the day today, IWBAT…• define and differentiate between heat, temperature, and thermal energy

Why it matters in LIFE: Heat and temperature impact our lives every single day – from what we decide to wear to how much our energy bill will be each month.

Why it matters in THIS CLASS: Don’t forget about your goal to succeed!

AgendaDo Now 5 minIntro to Thermo 20 minQuick Checks 10 minQuick Writes 10 min

Wednesday, 01/08/14TEKS:

P.6E: Describe how the macroscopic properties of a thermodynamic system such

as temperature, specific heat, and pressure are

related to the molecular level of matter, including

kinetic or potential energy of atoms

By the end of today, IWBAT…

Define and differentiate between heat, thermal energy,

and temperatureEssential Question:

How are heat, thermal energy,

and temperature

different?

Topic:Thermodynam

ics

You will receive trackers and cover sheets to accompany your C-Notes and Lab Assignments for this unit.

Unit 8: Thermodynamics

THERMODYNAMICS is the

study of changes in heat and energyThis unit will build on the ideas of

energy that we learned in unit 7

A Chemistry Review… All matter is made up of millions of tiny

particles These tiny particles are constantly in

motionPHYSICS CONNECTION:

When something is in motion, what type of

energy does it have?

Demo: Water and Food Coloring What did you notice? What can you say about higher

temperature and spread of the dye? What do you think temperature is really

measuring? What type of energy is motion related to? Why does the same object feel “hotter”

when its temperature is higher? How would you define temperature?

What is temperature? Temperature: A measurement of the

average kinetic energy possessed by the particles of an object

Thermometers read temperature If velocity increases, KE will increase, so

temperature increases (and vice versa)

What is temperature?

Faster molecules = more kinetic energy = higher temperature

Slower molecules = less kinetic energy = lower temperature

Kelvin: what Scientists useFahrenheit: what

America uses

Temperature Measured in:

Celsius: what the rest of the world uses Kelvin: what asdfuse sdfgCelsius: what the rest of the world

uses

Temperature

TC : Celsius TF : Fahrenheit TK : Kelvin

Conversions:TC = 0.56TF – 32TF = 1.8 TC + 32TK = TC + 273

What is thermal energy? Thermal energy: mechanical energy of

the particles in an object Measured in Joules

What is heat? Heat: the transfer of energy from areas

of high kinetic energy (fast-moving particles) to areas of low kinetic energy (slower-moving particles)

Demo Place one hand in the beaker of cold water and one

hand in the beaker of warm water. Hold them there for 30 seconds.

Place both hands in the tub of room temperature water. Hold them there for 30 seconds.

What do you observe about the hand that was in the hot water after it enters the room temperature water? 

What do you observe about the hand in the cold water after it enters the room temperature water?

Describe what you think is occurring in each hand in regard to the transfer of heat energy.

Temperature ≠ Thermal Energy ≠ HeatTemperatur

e:A

measurement of how FAST the

molecules are moving

(AKA the kinetic

energy of the

molecules)

Heat:The

PROCESS of transferring

thermal energy from where it is

high to where it is

low

Thermal Energy:

The total mechanical energy of

the PARTICLES

of an object

Quick Checks What is matter made up of? What are these particles always doing? What type of energy do these particles

have? What is temperature? What unit of temperature does most of

the world use? What unit of temperature do we use in

America? What unit of temperature do scientists

use?

Quick Checks What is thermal energy? What is mechanical energy? How is thermal energy different from the

mechanical energy we learned about last unit?

What is heat? How is heat different from thermal

energy? How is heat different from temperature? How is thermal energy different from

temperature?

Which way will heat transfer?

System Surroundings

Direction of Heat Transfer

Living Room (T=78˚F)

Outside Air (T=93˚ F)

?

Living Room

Attic (T=120˚F)

?

Attic Outside Air ?

Answer the following questions in COMPLETE SENTENCES on the back of your C-notes. Each answer should be a minimum of 2 sentences

Quick Writes

Question #1

Explain the difference between heat, temperature, and thermal energy.

Question #2

What happens to the molecules in your hand when you put it in hot water? Molecules of water?

Question #3

What happens to the molecules in your hand when you put it in cold water? Molecules of water?