Heat Transfer Fundamentals
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Greg Monty PhD, Vicki Foust PhD, and Elizabeth Keele M.Ed
Why Does Ice Melt?
We have a glass of water
•
The temperature of tap
water is about 21 ºC
•
The temperature of ice is
about 0 ºC
What will happen when the ice is
added to the water?
ANSWER: The ice will melt
Why?
Temperature difference
What happens to the temperature
of the water?
ANSWER: It will go down
Why?
When heat leaves the
water the temperature
goes down
What will you feel when you jump
into a pool?
You will feel Cold
Why would you feel cold?
•
Because HEAT flows from your body
to the lower-temperature pool water!
•
Whatever ‘body’ loses heat
DECREASES its TEMPERATURE
Have you ever put a cold cloth on
your forehead because of a fever?
Why?
Temperature difference allows heat from
body to transfer to cloth, thus reducing
body temperature
An ice bath would be even better!
Can you think of examples of Heat
Transfer?
Make a list of examples of Heat Transfer. Label them
as either Conduction, Convection, and/or Radiation.
Examples
•
Heating pot of water on stove (conduction, convection,
and radiation)
•
Cooling of the body by sweating (radiation)
•
Heating of buildings (Convection, and some radiation
from sunlight, and some radiation of heat to outside)
•
Cooling of buildings (Convection)
•
Melting ice, boiling water (Convection, conduction)
Examples of Heat Transfer
More Examples:
•
Shivering when cold
•
Heat from a car engine
•
Sun Warming of earth/weather
•
Burning of fuels/explosions
•
Ironing a shirt, drying clothes
•
Camp fire/roasting marshmallows
Examples of Heat Transfer
Let’s share one heat transfer example from
each group!
Thank you for participating in the
Explore the basics of heat transfer through examples like ice melting, jumping into a pool, and more. Learn how temperature differences lead to changes in energy transfer and feel the effects firsthand. Discover the principles of conduction, convection, and radiation in various scenarios that involve heat exchange.
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Presentation Transcript
CERT Educational Series Greg Monty PhD, Vicki Foust PhD, and Elizabeth Keele M.Ed Heat Transfer Enrichment I, Basics
Why Does Ice Melt? We have a glass of water The temperature of tap water is about 21 C The temperature of ice is about 0 C 21 C 0 C 0 C 0 C
What will happen when the ice is added to the water? ANSWER: The ice will melt 21 C 0 C 0 C Why? 0 C Temperature difference
What happens to the temperature of the water? ANSWER: It will go down Why? When heat leaves the water the temperature goes down
What will you feel when you jump into a pool? You will feel Cold
Why would you feel cold? Because HEAT flows from your body to the lower-temperature pool water! Whatever body loses heat DECREASES its TEMPERATURE
Have you ever put a cold cloth on your forehead because of a fever? Why? Temperature difference allows heat from body to transfer to cloth, thus reducing body temperature An ice bath would be even better!
Can you think of examples of Heat Transfer? Make a list of examples of Heat Transfer. Label them as either Conduction, Convection, and/or Radiation. Examples Heating pot of water on stove (conduction, convection, and radiation) Cooling of the body by sweating (radiation) Heating of buildings (Convection, and some radiation from sunlight, and some radiation of heat to outside) Cooling of buildings (Convection) Melting ice, boiling water (Convection, conduction)
Examples of Heat Transfer More Examples: Shivering when cold Heat from a car engine Sun Warming of earth/weather Burning of fuels/explosions Ironing a shirt, drying clothes Camp fire/roasting marshmallows
Examples of Heat Transfer Let s share one heat transfer example from each group!
Thank you for participating in the CERT Educational Series Heat Transfer Enrichment I: Basics
