How It Happens and the Different Types ©Copyright 2014 – all rights reserved .
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How It Happens and the Different Types ©Copyright 2014 – all rights reserved www.cpalms.org * Heat Transfer
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Transcript of How It Happens and the Different Types ©Copyright 2014 – all rights reserved .
How It Happens and the Different Types
©Copyright 2014 – all rights reserved www.cpalms.org
*Heat Transfer
*Soda!
*What happens to the temperature if I add ice cubes to a glass of soda?
*Write your answer down in your notes.
Image Source: http://upload.wikimedia.org/wikipedia/commons/c/cf/Tumbler_of_cola_with_ice.jpg
*Answer?
*How many of you wrote that the ice cubes make the soda cold?
Image Source: http://upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Ice_cubes_openphoto.jpg/640px-Ice_cubes_openphoto.jpg
*Wrong!
*What if I told you that ice cubes do not make soda cold?
*In fact, it is the soda that warms up the ice cube!
Image Source: http://pixabay.com/p-48867/?no_redirect
*Predict
*When will the heat transfer between the soda and the ice cubes stop? Why?
*Write your answer down in your notes.
Image Source: http://upload.wikimedia.org/wikipedia/commons/9/9d/Question_mark_blue.png
*Answer
*How many of you wrote, “When the ice has finished melting?”
*Please share your answers.
Image Source: http://photomatt7.files.wordpress.com/2012/02/hands-up-color.gif
*Equilibrium
*When the ice has finished melting, the temperature has increased.
*When the ice was added to the soda, the temperature of the soda decreased.
*The ice continued to melt until the soda and the ice reached the same temperature.
*This is because heat transfer continues until both objects have reached the same temperature.
*When the two objects have reached the same temperature, this is called Thermodynamic Equilibrium.
*Equilibrium
*PredictionsGuided Practice
*In your notes, number a set of lines 1-5.
*You will be shown a series of pictures. The pictures will show objects between which heat transfer will occur.
*On your paper, draw an arrow showing which direction the heat will transfer in.
*#1
Cool Air
Image Source: http://pixabay.com/p-159904/?no_redirect
Warm Skin
Image Source: http://upload.wikimedia.org/wikipedia/commons/6/64/Light_skin_and_hair.jpg
*#1 Answer
Cool Air
Image Source: http://pixabay.com/p-159904/?no_redirect
Warm Skin
Image Source: http://upload.wikimedia.org/wikipedia/commons/6/64/Light_skin_and_hair.jpg
Since the skin has a higher temperature than the air, the skin transfers heat to the air around it, making itself cooler.
*#2
Image Source: http://upload.wikimedia.org/wikipedia/commons/9/9f/Pahoeoe_fountain_edit2.jpg
Lava
Image Source: http://upload.wikimedia.org/wikipedia/commons/c/c1/Bare_mountain,_nevada.jpg
Mountain
*#2 Answer
Image Source: http://upload.wikimedia.org/wikipedia/commons/9/9f/Pahoeoe_fountain_edit2.jpg
Lava
Image Source: http://upload.wikimedia.org/wikipedia/commons/c/c1/Bare_mountain,_nevada.jpg
MountainSince the lava has a much higher temperature than the mountain, it transfers heat to the mountain wherever the two make contact.
*#3
Image Source: http://pixabay.com/p-29492/?no_redirect
Image Source: http://pixabay.com/p-308101/?no_redirect
Student Chair
*#3 Answer
Image Source: http://pixabay.com/p-29492/?no_redirect
Image Source: http://pixabay.com/p-308101/?no_redirect
Student Chair
The typical human body is around 98.6 degrees Fahrenheit, whereas a chair is usually room temperature, 75 degrees Fahrenheit. When the two come into contact, heat transfers from the student to the chair. That’s why the chair feels cool.
*#4
Image Source: Erika Trnka
Image Source: http://pixabay.com/static/uploads/photo/2013/07/12/17/12/sun-151763_640.png
Apollo the Lizard
The Sun
*#4 Answer
Image Source: Erika Trnka
Image Source: http://pixabay.com/static/uploads/photo/2013/07/12/17/12/sun-151763_640.png
Apollo the Lizard
The Sun
Heat will transfer from the Sun to the lizard. There is nothing on Earth hotter than the Sun, and besides: lizards are exothermic!
Exothermic: getting body heat from an outside source
*#5
Image Source: http://photos1.blogger.com/blogger/3504/1968/400/Lightbulb.png
Image Source: http://upload.wikimedia.org/wikipedia/commons/f/fd/1950s_Sitting_Room_(6320021131).jpg
Light Bulb Air in a room
*#5 Answer
Image Source: http://photos1.blogger.com/blogger/3504/1968/400/Lightbulb.png
Image Source: http://upload.wikimedia.org/wikipedia/commons/f/fd/1950s_Sitting_Room_(6320021131).jpg
Light Bulb Air in a roomWhen a light bulb gives off light, it also gives off heat. This heat warms up the surrounding air. If you place your hand near a light bulb (don’t touch!), you will feel the heat.
*Rally Coach
*Step 1: Partner A looks at question one and shares the answer with partner B.
*Step 2: Partner B either approves of the answer, or guides partner A to the correct answer.
*Step 3: Once an answer is agreed upon, Partner A asks, "May I write it down?"
*Step 4: Partner B either agrees or provides further coaching until a correct answer is agreed upon.
*Step 5: Partner A picks up the writing utensil and writes down the answer. Then Partner A hands the writing utensil to Partner B, and the steps repeat.
*If these instructions are not followed, you will complete the work by yourself.
