Heat - Revision history

Jmdonev: 1 revision imported

2021-09-27T00:02:39Z

1 revision imported

← Older revision	Revision as of 00:02, 27 September 2021
(No difference)

energy>Ethan.boechler at 18:56, 18 June 2021

2021-06-18T18:56:44Z

← Older revision		Revision as of 18:56, 18 June 2021
Line 1:		Line 1:
	[[Category:Done ~~2020~~-02-29]]		[[Category:Done 2021-01-31]]
			[[Category: Translated to Spanish]]
			[[es:Calor]]
			[[Category:Translated to French]]
			[[fr:Chaleur]]
	[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]		[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]
	<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).		<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information). Both can change the temperature of a substance, and heat can be turned into work (not perfectly) and work can be turned into heat. This equivalence is the basis of how [[heat engine]]s power [[High energy society\|modern society]].

	'''Note''':		'''Note''': When taking courses on energy, it's important to understand that heat and temperature are '''not''' the same. Confusion about the difference between heat and temperature often leads to getting the wrong answer on exams. For an explanation on why, visit [[heat vs temperature]].
	* Heat and temperature are '''not''' the same. For an explanation on why, visit [[heat vs temperature]].

	The [[second law of thermodynamics]] ~~proves that~~ heat will always flow spontaneously from higher temperatures to lower temperatures. This energy flow can be harnessed by a [[heat engine]] to do useful work. [[Heat pump]]s can also force thermal energy to flow ~~backwards~~ (from cold to hot), but these require energy input.		The [[second law of thermodynamics]] explains why heat will always flow spontaneously from higher temperatures to lower temperatures. This energy flow can be harnessed by a [[heat engine]] to do useful work. [[Heat pump]]s can also force thermal energy to flow backward (from cold to hot), but these require energy input.

	==Methods of heat transfer==		==Methods of heat transfer==
Line 12:		Line 15:
	There are three [[heat transfer mechanisms]]:<ref>Hyperphysics, ''Heat Transfer'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.html</ref>		There are three [[heat transfer mechanisms]]:<ref>Hyperphysics, ''Heat Transfer'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.html</ref>

	*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic [[kinetic energy]] to slower particles.		*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast-moving or vibrating particles to give some of their microscopic [[kinetic energy]] to slower particles.

	*'''[[Convection]]''' is [[heat transfer]] caused by moving [[fluid]]s. In a fluid, particles can mix together, move faster, and spread out, thus distributing their thermal energy. Warm [[air]] coming from a [[heating registers and vents\|heating vent]] to flow around a cool room is an example of convection.		*'''[[Convection]]''' is [[heat transfer]] caused by moving [[fluid]]s. In a fluid, particles can mix together, move faster, and spread out, thus distributing their thermal energy. Warm [[air]] coming from a [[heating registers and vents\|heating vent]] to flow around a cool room is an example of convection.

	*'''[[Radiation]]''' occurs without the movement of [[matter]]. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire surface of the Earth is heated by the [[sun]]'s [[solar radiation]].		*'''[[Radiation]]''' occurs without the movement of [[matter]]. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire surface of the Earth is heated by the [[sun]]'s [[solar radiation]].


	See [[heat transfer mechanisms]] for general information on how heat moves.		See [[heat transfer mechanisms]] for general information on how heat moves.
Line 22:		Line 26:
	==For Further Reading==		==For Further Reading==
	*[[Heat vs temperature]]		*[[Heat vs temperature]]
			*[[Heat vs work]]
	*[[Thermal equilibrium]]		*[[Thermal equilibrium]]
	*[[Second law of thermodynamics]]		*[[Second law of thermodynamics]]

Jmdonev: 1 revision imported

2020-04-28T15:32:36Z

1 revision imported

← Older revision	Revision as of 15:32, 28 April 2020
(No difference)

energy>Jmdonev at 21:42, 10 April 2020

2020-04-10T21:42:43Z

← Older revision		Revision as of 21:42, 10 April 2020
Line 1:		Line 1:
	[[Category:Done ~~2018~~-06-15]]		[[Category:Done 2020-02-29]]
	[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]		[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]
	<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).		<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).
Line 6:		Line 6:
	* Heat and temperature are '''not''' the same. For an explanation on why, visit [[heat vs temperature]].		* Heat and temperature are '''not''' the same. For an explanation on why, visit [[heat vs temperature]].

	The [[second law of thermodynamics]] proves that heat will always flow spontaneously from higher temperatures to lower temperatures. This energy [[flow]] can be harnessed by a [[heat engine]] to do useful work. [[Heat pump]]s can also force thermal energy to flow backwards (from cold to hot), but these require energy input.		The [[second law of thermodynamics]] proves that heat will always flow spontaneously from higher temperatures to lower temperatures. This energy flow can be harnessed by a [[heat engine]] to do useful work. [[Heat pump]]s can also force thermal energy to flow backwards (from cold to hot), but these require energy input.

	==Methods of heat transfer==		==Methods of heat transfer==

Jmdonev: 1 revision imported

2018-06-25T14:30:25Z

1 revision imported

← Older revision	Revision as of 14:30, 25 June 2018
(No difference)

Jmdonev at 20:29, 8 June 2018

2018-06-08T20:29:15Z

← Older revision		Revision as of 20:29, 8 June 2018
Line 1:		Line 1:
	[[Category:Done ~~2015~~-09-06]]		[[Category:Done 2018-06-15]]
	[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]		[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]
	<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).		<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).
Line 14:		Line 14:
	*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic [[kinetic energy]] to slower particles.		*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic [[kinetic energy]] to slower particles.

	*'''[[Convection]]''' is [[heat transfer]] caused by moving [[fluid]]s. In a fluid, particles can mix together ~~and the~~ faster ~~particles move around~~ and spread out, thus distributing their thermal energy. Warm [[air]] coming from a [[heating registers and vents\|heating vent]] to flow around a cool room is an example of convection.		*'''[[Convection]]''' is [[heat transfer]] caused by moving [[fluid]]s. In a fluid, particles can mix together, move faster, and spread out, thus distributing their thermal energy. Warm [[air]] coming from a [[heating registers and vents\|heating vent]] to flow around a cool room is an example of convection.

	*'''[[Radiation]]''' occurs without the movement of [[matter]]. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire surface of the Earth is heated by the [[sun]]'s [[solar radiation]].		*'''[[Radiation]]''' occurs without the movement of [[matter]]. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire surface of the Earth is heated by the [[sun]]'s [[solar radiation]].

	See [[heat transfer mechanisms]] for general information on how heat moves.		See [[heat transfer mechanisms]] for general information on how heat moves.

			==For Further Reading==
			*[[Heat vs temperature]]
			*[[Thermal equilibrium]]
			*[[Second law of thermodynamics]]
			*[[Conduction]]
			*[[Convection]]
			*[[Radiation]]
			*Or explore a [[Special:Random\|random page]]
	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-09-18T16:50:49Z

1 revision imported

← Older revision	Revision as of 16:50, 18 September 2015
(No difference)

Jhanania at 19:20, 3 September 2015

2015-09-03T19:20:05Z

← Older revision		Revision as of 19:20, 3 September 2015
Line 1:		Line 1:
	[[Category:Done 2015-07-24]]		[[Category:Done 2015-09-06]]
	[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]		[[File:Aerogel.jpg\|framed\|right\|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]
	<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same units as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).		<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same [[units]] as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).

	'''Note''':		'''Note''':
Line 14:		Line 14:
	*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic [[kinetic energy]] to slower particles.		*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic [[kinetic energy]] to slower particles.

	*'''[[Convection]]''' is heat transfer caused by moving ~~fluids~~. In a fluid, particles can mix together and the faster particles move around and spread out, thus distributing their thermal energy. Warm air coming from a heating vent to flow around a cool room is an example of convection.		*'''[[Convection]]''' is [[heat transfer]] caused by moving [[fluid]]s. In a fluid, particles can mix together and the faster particles move around and spread out, thus distributing their thermal energy. Warm [[air]] coming from a [[heating registers and vents\|heating vent]] to flow around a cool room is an example of convection.

	*'''[[Radiation]]''' occurs without the movement of matter. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire Earth is heated by the [[sun]]'s [[solar radiation]].		*'''[[Radiation]]''' occurs without the movement of [[matter]]. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire surface of the Earth is heated by the [[sun]]'s [[solar radiation]].

	See [[heat transfer mechanisms]] for general information on how heat moves.		See [[heat transfer mechanisms]] for general information on how heat moves.

J.williams: 1 revision imported

2015-08-26T21:30:48Z

1 revision imported

← Older revision	Revision as of 21:30, 26 August 2015
(No difference)

J.williams at 16:43, 12 August 2015

2015-08-12T16:43:02Z

New page

[[Category:Done 2015-07-24]]
[[File:Aerogel.jpg|framed|right|Figure 1. Aerogel is a type of insulating material, meaning that it is very resistant to the flow of heat by conduction.<ref>Wikimedia Commons. (July 30, 2015). ''Aerogel'' [Online]. Available: https://upload.wikimedia.org/wikipedia/commons/b/b4/Aerogel_matches.jpg</ref>]]
<onlyinclude>'''Heat''' is a transfer of [[thermal energy]] caused by a difference in [[temperature]]. This temperature difference is also called a [[temperature gradient]].<ref>R. Chabay and B. Sherwood, "Fundamental Limitations on Efficiency," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.13, sec.7, pp. 534</ref></onlyinclude> Since heat is a movement of [[energy]], it is measured in the same units as energy: [[joule]]s (J). It should also be noted that [[work]] and heat are closely related (see [[heat vs work]] for more information).

'''Note''':
* Heat and temperature are '''not''' the same. For an explanation on why, visit [[heat vs temperature]].

The [[second law of thermodynamics]] proves that heat will always flow spontaneously from higher temperatures to lower temperatures. This energy [[flow]] can be harnessed by a [[heat engine]] to do useful work. [[Heat pump]]s can also force thermal energy to flow backwards (from cold to hot), but these require energy input.

==Methods of heat transfer==

There are three [[heat transfer mechanisms]]:<ref>Hyperphysics, ''Heat Transfer'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.html</ref>

*'''[[Conduction]]''' occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic [[kinetic energy]] to slower particles.

*'''[[Convection]]''' is heat transfer caused by moving fluids. In a fluid, particles can mix together and the faster particles move around and spread out, thus distributing their thermal energy. Warm air coming from a heating vent to flow around a cool room is an example of convection.

*'''[[Radiation]]''' occurs without the movement of matter. Thermal radiation is made of electromagnetic waves given off by moving particles.<ref>R. Chabay and B. Sherwood, "Energy and Momentum in Radiation," in Matter & Interactions, 3rd ed., Hoboken, NJ: Wiley, 2011, ch.24, sec.5, pp. 1002-1003</ref> These waves can also be absorbed by materials. Microwave ovens work by radiation and the entire Earth is heated by the [[sun]]'s [[solar radiation]].

See [[heat transfer mechanisms]] for general information on how heat moves.
==References==
{{reflist}}
[[Category:Uploaded]]