Heat vs temperature - Revision history

Jmdonev: 1 revision imported

2021-12-20T19:47:15Z

1 revision imported

← Older revision	Revision as of 19:47, 20 December 2021
(No difference)

energy>Alba.fano-trabanco: Undo revision 53997 by Alba.fano-trabanco (talk)

2021-12-14T02:04:26Z

Undo revision 53997 by Alba.fano-trabanco (talk)

← Older revision		Revision as of 02:04, 14 December 2021
Line 1:		Line 1:
	[[Category:Done ~~2018~~-08-03]]		[[Category:Done 2021-10-29]]
	[[Category:Translated to French]]		[[Category:Translated to French]]
	[[fr:Chaleur vs température]]		[[fr:Chaleur vs température]]
Line 29:		Line 29:
	*[[Temperature]]		*[[Temperature]]
	*[[Thermal energy]]		*[[Thermal energy]]
	*[[~~Kinetic energy~~]]		*[[Enthalpy]]
	*[[Internal energy]]		*[[Internal energy]]
	*Or explore a [[Special:Random\|random page]]		*Or explore a [[Special:Random\|random page]]

Jmdonev: 1 revision imported

2021-09-27T00:03:15Z

1 revision imported

← Older revision	Revision as of 00:03, 27 September 2021
(No difference)

energy>Ethan.boechler at 16:33, 13 September 2021

2021-09-13T16:33:09Z

← Older revision		Revision as of 16:33, 13 September 2021
Line 1:		Line 1:
	[[Category:Done 2018-08-03]]		[[Category:Done 2018-08-03]]
			[[Category:Translated to French]]
			[[fr:Chaleur vs température]]
	<onlyinclude>'''Heat''' and '''temperature''' are a closely related topic, and as such, the difference between the two can be a bit confusing. The core difference is that [[heat]] deals with [[thermal energy]], whereas [[temperature]] is more concerned with molecular [[kinetic energy]].</onlyinclude>		<onlyinclude>'''Heat''' and '''temperature''' are a closely related topic, and as such, the difference between the two can be a bit confusing. The core difference is that [[heat]] deals with [[thermal energy]], whereas [[temperature]] is more concerned with molecular [[kinetic energy]].</onlyinclude>

Jmdonev: 1 revision imported

2018-09-03T22:23:38Z

1 revision imported

← Older revision	Revision as of 22:23, 3 September 2018
(No difference)

energy>Jmdonev at 18:53, 13 August 2018

2018-08-13T18:53:36Z

← Older revision		Revision as of 18:53, 13 August 2018
Line 1:		Line 1:
	[[Category:Done ~~2015~~-06-~~11]]~~		[[Category:Done 2018-08-03]]
	~~[[Category: needs citations~~]]
	<onlyinclude>'''Heat''' and '''temperature''' are a closely related topic, and as such, the difference between the two can be a bit confusing. The core difference is that [[heat]] deals with [[thermal energy]], whereas [[temperature]] is more concerned with molecular [[kinetic energy]].</onlyinclude>		<onlyinclude>'''Heat''' and '''temperature''' are a closely related topic, and as such, the difference between the two can be a bit confusing. The core difference is that [[heat]] deals with [[thermal energy]], whereas [[temperature]] is more concerned with molecular [[kinetic energy]].</onlyinclude>

			[[File:temp vs heat new.png\|thumb\|right\|500px\|Heat is the transfer of thermal energy, whereas temperature is a property the object exhibits.<ref>This was made internally by a member of the Energy Education team.</ref>]]

	==Whats the difference?==		==Whats the difference?==
	'''Heat''' describes the ''transfer'' of thermal energy between molecules within a system and is measured in [[Joule]]s. Heat measures how [[energy]] moves or flows. An object can gain heat or lose heat, but it cannot have heat. Heat is a measure of change, never a property possessed by an object or system.		'''Heat''' describes the ''transfer'' of thermal energy between molecules within a system and is measured in [[Joule]]s.<ref>R. Knight, Physics for scientists and engineers, 3rd ed. Pearson, 2013, p. 279</ref> Heat measures how [[energy]] moves or flows. An object can gain heat or lose heat, but it cannot have heat. Heat is a measure of change, never a property possessed by an object or system. Therefore, it is classified as a [[process variable]].

	'''Temperature''' describes the ''average'' kinetic energy of molecules within a material or system and is measured in [[Celsius]] (°C), [[Kelvin]](K), [[Fahrenheit]] (°F), or [[Rankine]] (R). It is a measurable physical property of an ~~object~~. Other measurable physical properties include [[velocity]], [[mass]], and [[density]], to name a few.		'''Temperature''' describes the ''average'' kinetic energy of molecules within a material or system and is measured in [[Celsius]] (°C), [[Kelvin]](K), [[Fahrenheit]] (°F), or [[Rankine]] (R). It is a measurable physical property of an object—also known as a [[state variable]]. Other measurable physical properties include [[velocity]], [[mass]], and [[density]], to name a few.<ref>R. Knight, Physics for scientists and engineers, 3rd ed. Pearson, 2013, p. 445</ref>

	===Similarities===		===Similarities===
Line 18:		Line 19:

	==Thought experiment==		==Thought experiment==
	Imagine the aforementioned ice cube dropped into a bowl of warm ~~water, the~~ ice ''must'' gain heat (thermal energy) from the water in the bowl (see preceding paragraph). Adding thermal energy leads to an increase in the ~~translational~~ [[kinetic energy]] of the ice molecule, and thus an increase in temperature. This is known because temperature is in fact the measure of the average ~~translational~~ kinetic energy of the molecules. Furthermore, the ice will continue to gain thermal energy causing its molecules to move faster and eventually break their intermolecular bonds or melt.		Imagine the aforementioned ice cube dropped into a bowl of warm water—the ice ''must'' gain heat (thermal energy) from the water in the bowl (see preceding paragraph). Adding thermal energy leads to an increase in the [[kinetic energy]] of the ice molecule, and thus an increase in temperature. This is known because temperature is in fact the measure of the average kinetic energy of the molecules. Furthermore, the ice will continue to gain thermal energy causing its molecules to move faster and eventually break their intermolecular bonds or melt.

			In conclusion, the transfer of heat or thermal energy will typically change the temperature of the substance, '''but not always'''! For example, at the moment when the ice in the bowl turns to water those water molecules will be at the exact same temperature as when they were ice. In this case, instead of the thermal energy doing work to increase the kinetic energy, it does work to break the intermolecular bonds, causing a change of state. However, as time goes on the temperature of the recently melted ice will increase until everything within the bowl reaches equilibrium—meaning a consistent temperature throughout.

			==For Further Reading==
			*[[Heat]]
			*[[Temperature]]
			*[[Thermal energy]]
			*[[Kinetic energy]]
			*[[Internal energy]]
			*Or explore a [[Special:Random\|random page]]

	In conclusion, the transfer of heat or thermal energy will typically change the temperature of the substance, '''but not always'''! For example, at the moment when the ice in the bowl turns to water those water molecules will be at the exact same temperature as when they were ice. In this case, instead of the thermal energy doing work to increase the translational kinetic energy, it does work to break the intermolecular bonds, causing a change of state. However, as time goes on the temperature of the recently melted ice will increase until everything within the bowl reaches equilibrium - meaning a consistent temperature throughout.		==References==
			{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:31:10Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
(No difference)

J.williams at 16:54, 12 August 2015

2015-08-12T16:54:40Z

New page

[[Category:Done 2015-06-11]]
[[Category: needs citations]]
<onlyinclude>'''Heat''' and '''temperature''' are a closely related topic, and as such, the difference between the two can be a bit confusing. The core difference is that [[heat]] deals with [[thermal energy]], whereas [[temperature]] is more concerned with molecular [[kinetic energy]].</onlyinclude>

==Whats the difference?==
'''Heat''' describes the ''transfer'' of thermal energy between molecules within a system and is measured in [[Joule]]s. Heat measures how [[energy]] moves or flows. An object can gain heat or lose heat, but it cannot have heat. Heat is a measure of change, never a property possessed by an object or system.

'''Temperature''' describes the ''average'' kinetic energy of molecules within a material or system and is measured in [[Celsius]] (°C), [[Kelvin]](K), [[Fahrenheit]] (°F), or [[Rankine]] (R). It is a measurable physical property of an object. Other measurable physical properties include [[velocity]], [[mass]], and [[density]], to name a few.

===Similarities===
Heat is a transfer of thermal energy caused by a ''difference'' in temperature between molecules.

=====Note:=====
[[Thermal energy]] can be otherwise understood as the total [[internal energy|microscopic kinetic and potential energy]] of a system.

===Second Law of Thermodynamics===
The [[second law of thermodynamics]] is a complex topic that requires intensive study in the field of [[thermodynamics]] to truly understand. However, for the purpose of this article, only one small aspect needs to be understood and that is the fact that '''heat will always flow spontaneously from hotter substances to colder ones'''. This simple statement explains why an ice cube doesn't form outside on a hot day or why it melts when dropped in a bowl of warm water.

==Thought experiment==
Imagine the aforementioned ice cube dropped into a bowl of warm water, the ice ''must'' gain heat (thermal energy) from the water in the bowl (see preceding paragraph). Adding thermal energy leads to an increase in the translational [[kinetic energy]] of the ice molecule, and thus an increase in temperature. This is known because temperature is in fact the measure of the average translational kinetic energy of the molecules. Furthermore, the ice will continue to gain thermal energy causing its molecules to move faster and eventually break their intermolecular bonds or melt.

In conclusion, the transfer of heat or thermal energy will typically change the temperature of the substance, '''but not always'''! For example, at the moment when the ice in the bowl turns to water those water molecules will be at the exact same temperature as when they were ice. In this case, instead of the thermal energy doing work to increase the translational kinetic energy, it does work to break the intermolecular bonds, causing a change of state. However, as time goes on the temperature of the recently melted ice will increase until everything within the bowl reaches equilibrium - meaning a consistent temperature throughout.
[[Category:Uploaded]]