Heat Transfer Enrichment I, Basics

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Presentation transcript:

Heat Transfer Enrichment I, Basics 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 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!

CERT Educational Series Heat Transfer Enrichment I: Basics Thank you for participating in the CERT Educational Series Heat Transfer Enrichment I: Basics