Unit 3 Heat & Temperature

Warm Up Grab a new UNIT 3 Warm Up sheet from materials table, then answer these questions: 1.Would you rather have a bucket full of $100 or a pool full of $5? 2.When you put money in the bank, do you put in your savings account or your checking account? Is there a difference between these two accounts? Essential Questions EQ: What is the difference between heat and temperature? HOTQ1: What does the heating/cooling curve look like for water? HOTQ2: What is “phase energy”? HOTQ3: What is “thermal energy”?

Agenda Warm Up Agenda Eureka! (Heat v. Temperature) Test Return/Tracking Icy-HOT Lab Exit Ticket

Video: Heat vs. Temperature Video Summary At what temperature does water freeze? Boil? Is there more “hotness” in the cup or the bucket? Why? Does the amount of molecules have anything to do with temperature (or “degree of hotness”)? ______ ____combined with ______________ = Quantity of Hotness (HEAT)

Consensus Temperature: (degree of hotness) is a measure of speed of molecules Heat: (quantity of hotness) is a measure of both the mass and speed of molecules. – Transfer of energy due to thermal contact Notes

Test Return/Tracking 1 st Block: 86.12% 2 nd Block: 91.42% 3 rd Block: 85.02% WE ALL MADE OUR BIG GOAL! We. Just. Became….Legendary.

POINT MILESTONEPRIZE 120Music during worktime 140Guaranteed Game 160Popcorn party 180Candy 200Homework Pass 220Cookies/brownies 240Pizza

Track it. Track it. Track it.

Example Tracker & handouts Flip to documents

Lab Intro- – Purpose: Determine the relationship between energy transfer, energy storage, and the three phases of matter. – Hypothesis: Predict what the graph of temperature vs. time will look like when ice is heated until it melts into liquid and then starts to boils to gas.

Materials and Method – Materials- beaker Hot plate/bunsen burner Thermometer Stirring rod Crushed ice Methods: Be sure to write precisely what steps you took to complete this lab. Your procedure should be clear enough for someone else to follow  Do this while you wait for ice to melt!

A: Responsible for keeping time (every 30 seconds) – allowed to have cell phone ONLY for timing purposes (stopwatch) B: measures temperature C: stirs periodically with thermometer D: graphs data after each temp. measurement (but everyone in team must have this graph ultimately)

Graph should have “energy supplied” on x- axis and temperature on y- axis

Background Info – Background Info System: Surroundings: Phase change:

Are there distinct regions to your graph? If so, draw them on your graph. What is happening to the system (ice, water, etc) in these regions? Label the regions with solid, solid-liquid, liquid, liquid-gas, gas. If heat energy is being supplied at a constant rate, why doesn’t the temperature change at a constant rate? (Why doesn’t the graph look like Pressure v. Temp?)

Consensus Energy is like money when you have a lot of money, you want to spend it. Money transfers from high  low) – In the same way, energy flows from high energy  low energy (in this case, from hot plate to ice) – In the same way that money can be deposited into different accounts, energy is deposited into different energy “accounts” These accounts have different purposes, do different things You do not have to write this. Just listen.

Consensus During a phase change, as energy is supplied to a system, it can be “deposited” into two different energy accounts: either thermal energy (E th ) or phase energy (E ph ) Thermal energy acts to increase the temperature when only one phase is present. Phase energy acts to break down the attractions between particles that hold them together as solid, liquid, or gas, resulting in a phase change. Label your graph where thermal energy (E th ) and phase energy (E ph ) are increasing Notes – Write!!!

Exit Ticket 1.Are the following characteristics associated with PHASE ENERGY or THERMAL ENERGY? - increases temperature _____ - acts to break down the attractions between particles that hold them together as solid, liquid, or gas ___ - involved when only phase is present____ - involved when the phase is changing ____ HOMEWORK: WORKSHEET #1