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Heat Theory

By: Morgan Rogers Heat: Transfer of thermal energy from one object to another, l ike work (transfer of mechanical energy)

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Why Heat is important: The key to human life! J

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Keeps you alive à the

human body needs

heat for warmth, and

because the energy

breaks down and food

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Powers our homes,

buildings, cars,

laptops, and

everything we use in

daily life.

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Evolve Explain

Evolution of the various Heat Theories:

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The Ancient Greeks à

The Ancient Greeks believed that

heat was derived of one of the four

elements of earth: fire.

Phlogiston à

An invisible substance

found in things that

burned

Caloric à

Invisible fluid that would flow from warm objects to cooler ones (Calorie: amount of energy to heat 1g of water to 1 C) Count Rumford à

Heat is equivalent to energy

Current à Kinetic

Molecular (James Joule)

Energy à ability to do work

Work à transfer mechanical energy

W = F Δd

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WHERE: We find daily uses for heat

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- Electricity

- Cooking

- Washing and drying

clothes

- Providing warmth

- Running our

appliances

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- Keep living things

alive (Heat our

bodies, plants,

animals, and humans

food)

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+ Difference between Heat and Temperature

Heat: the total amount of

thermal energy in a

substance

Temperature: the

average kinetic energy of

atoms in a substance

E.g. Iceberg VS a cup of

coffee

The iceberg has more

heat but a lower

temperature and the

coffee has less heat but a

higher temperature

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Additional information!! Relevant, interesting, and extra facts about heat!

The human can only survive 24 hours without heat Heat moves in 3 ways: Conduction, Convection, and Radiation Dallol, Ethiopia is the hottest inhabited place on the planet

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Geothermal Power:

Geothermal power

is when heat from

the earth’s crust is

used to make

electricity

Laws of thermodynamics:

1. energy cannot be created or destroyed but can be transferred from one object to another or from one form to another

2. it is not possible for any process to remove thermal energy from an energy source and convert it entirely to work i.e. nothing is 100% efficient

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"Kids Korner - Why We Need Energy - Apogee Interactive, Inc." 22 Nov. 2012

http://c03.apogee.net/contentplayer/?coursetype=kids&utilityid=novec&id=16164

Roberts, Douglas. "Chapter 4." Trans. Array ScienceFocus10. 140-164.

Print.

"Heat - Globio." 2011. 22 Nov. 2012

<http://www.globio.org/glossopedia/article.aspx?art_id=68>

"QI: Quite interesting facts about the heat - Telegraph." 2011. 22 Nov. 2012

<http://www.telegraph.co.uk/culture/qi/8271418/QI-Quite-interesting-facts-about-the-

heat.html>

"Antoine Laurent Lavoisier - ignored - University of Virginia." 22 Nov. 2012

http://cti.itc.virginia.edu/~meg3c/classes/tcc313/200Rprojs/lavoisier2/home.html

"Interesting Facts About Heat - House and Home." 2010. 22 Nov. 2012

http://www.houseandhome.org/tag/interesting-facts-about-heat

Bibliography:

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Morgan Rogers