Melting point - Revision history

Jmdonev: 1 revision imported

2026-08-04T20:43:54Z

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energy>Jmdonev at 06:08, 30 July 2026

2026-07-30T06:08:40Z

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	[[File:ice-263823_640.jpg\|300px\|thumb\|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]		[[es:Punto de fusión]]
			<onlyinclude>[[File:ice-263823_640.jpg\|300px\|thumb\|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]'''Melting point''' is the [[temperature]] at which a [[solid]] will [[phase change\|change phase]] into a [[liquid]].</onlyinclude> In theory it will also be the same temperature as the ''freezing point'', where a liquid will turn into a solid, but in practice there are slight differences.<ref name="pur">Purdue Chemistry, ''Melting point, Freezing point, Boiling point'' [Online], Available: http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch14/melting.php#melt</ref> For example, in theory pure water has a melting point ''and'' freezing point at [[Celsius\|0°C]] under [[STP\|standard temperature and pressure]], but slight measurable differences tend to arise.

	~~<!--T:2-->~~		The transition between the solid and the liquid is so sharp for small samples of a pure substance that melting points can be measured to 0.1°C.<ref name="pur" /> Therefore melting points can be used to accurately measure the purity of a substance.<ref>Encyclopaedia Brittanica, ''Melting point'' [Online], Available: http://www.britannica.com/EBchecked/topic/374185/melting-point</ref> See Figure 1 on the right.
	~~<onlyinclude>'''Melting point''' is~~ the ~~[[temperature]] that a [[~~solid~~]] will [[phase change\|change phase]] into~~ a ~~[[liquid]]~~.</~~onlyinclude~~> ~~In theory it will also~~ be the ~~same temperature as the ''freezing point'', where a liquid will turn into~~ a ~~solid, but in practice there are slight differences~~.<ref ~~name=pur~~>~~Purdue Chemistry~~, ''Melting ~~point, Freezing point, Boiling~~ point'' [Online], Available: http://~~chemed.chem~~.~~purdue~~.~~edu/genchem~~/~~topicreview~~/bp/~~ch14~~/melting~~.php#melt~~</ref> ~~For example, in theory pure water has a melting point ''and'' freezing point at [[Celsius\|0°C]] under [[STP\|standard temperature and pressure]], but slight measurable differences tend to arise~~.

	~~<!--T:3-->~~		While the solid is in the process of melting, its temperature will not change (see Figure 2 below). This is known as [[latent heat]], which is the opposite of [[sensible heat]].
	While the solid is in the process is melting, its temperature will not change. This is known as [[latent heat]], which is the opposite of [[sensible heat]]. ~~The transition between the solid and the liquid~~ is ~~so sharp~~ for ~~small samples of a pure substance that melting points can be measured to 0.1°C~~.<ref ~~name=pur/~~> ~~Therefore melting points can be used to accurately measure the purity of a substance~~.~~<ref>Encyclopaedia Brittanica~~, ''~~Melting point~~'' [Online], Available: ~~http~~://www.~~britannica~~.com/~~EBchecked~~/~~topic~~/~~374185/melting~~-~~point~~</ref>		[[File:Ating-20curve-20of-20water1.jpg\|left\|thumb\|Figure 2. This is a heating curve diagram, specifically for water.<ref>Lumen Learning (2015). (Accessed July 29, 2026). ''Introduction to Chemistry: Heating Curve for Water'' [Online]. Available: https://www.collegesidekick.com/study-guides/introchem/heating-curve-for-water</ref> Notice how temperature (on the y-axis) stays constant during a phase change. This is because the heat absorbed (x-axis) is being used to weaken intermolecular bonds instead of accumulating as kinetic energy.]]

	==References== ~~<!--T:4-->~~		== For Further Reading ==

			* [[Temperature]]
			* [[Phase change]]
			* [[Standard conditions for temperature and pressure]]
			* [[Latent heat]]
			* [[Sensible heat]]
			* Or explore a [[Special:Random\|random page]]

			==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

Jmdonev at 01:57, 29 August 2017

2017-08-29T01:57:32Z

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	[[File:ice-263823_640.jpg\|300px\|thumb\|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]		[[File:ice-263823_640.jpg\|300px\|thumb\|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]
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Jmdonev: 1 revision imported

2017-08-29T01:46:47Z

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Jmdonev at 15:52, 28 July 2017

2017-07-28T15:52:47Z

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	[[File:ice-263823_640.jpg\|300px\|thumb\|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]		[[File:ice-263823_640.jpg\|300px\|thumb\|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]

	<onlyinclude>'''Melting point''' is the [[temperature]] that a [[solid]] will [[phase change\|change phase]] into a [[liquid]].</onlyinclude> In theory it will also be the same temperature as the ''freezing point'', where a liquid will turn into a solid, but in practice there are slight differences.<ref name=pur>Purdue Chemistry, ''Melting point, Freezing point, Boiling point'' [Online], Available: http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch14/melting.php#melt</ref> For example, in theory pure water has a melting point ''and'' freezing point at [[~~celsius~~\|0°C]] under [[standard ~~test conditions~~]], but slight measurable differences tend to arise.		<!--T:2-->
			<onlyinclude>'''Melting point''' is the [[temperature]] that a [[solid]] will [[phase change\|change phase]] into a [[liquid]].</onlyinclude> In theory it will also be the same temperature as the ''freezing point'', where a liquid will turn into a solid, but in practice there are slight differences.<ref name=pur>Purdue Chemistry, ''Melting point, Freezing point, Boiling point'' [Online], Available: http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch14/melting.php#melt</ref> For example, in theory pure water has a melting point ''and'' freezing point at [[Celsius\|0°C]] under [[STP\|standard temperature and pressure]], but slight measurable differences tend to arise.

			<!--T:3-->
	While the solid is in the process is melting, its temperature will not change. This is known as [[latent heat]], which is the opposite of [[sensible heat]]. The transition between the solid and the liquid is so sharp for small samples of a pure substance that melting points can be measured to 0.1°C.<ref name=pur/> Therefore melting points can be used to accurately measure the purity of a substance.<ref>Encyclopaedia Brittanica, ''Melting point'' [Online], Available: http://www.britannica.com/EBchecked/topic/374185/melting-point</ref>		While the solid is in the process is melting, its temperature will not change. This is known as [[latent heat]], which is the opposite of [[sensible heat]]. The transition between the solid and the liquid is so sharp for small samples of a pure substance that melting points can be measured to 0.1°C.<ref name=pur/> Therefore melting points can be used to accurately measure the purity of a substance.<ref>Encyclopaedia Brittanica, ''Melting point'' [Online], Available: http://www.britannica.com/EBchecked/topic/374185/melting-point</ref>

	==References==		==References== <!--T:4-->
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J.williams: 1 revision imported

2015-08-26T21:31:21Z

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J.williams at 16:56, 12 August 2015

2015-08-12T16:56:53Z

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[[Category:Done 2015-06-11]]
[[File:ice-263823_640.jpg|300px|thumb|Figure 1. Pure water has a melting point of 0°C, which allows one to test any other sample of water to check its purity.<ref>tedrafranklin, Pixabay [Online], Available: http://pixabay.com/p-263823/?no_redirect</ref>]]

<onlyinclude>'''Melting point''' is the [[temperature]] that a [[solid]] will [[phase change|change phase]] into a [[liquid]].</onlyinclude> In theory it will also be the same temperature as the ''freezing point'', where a liquid will turn into a solid, but in practice there are slight differences.<ref name=pur>Purdue Chemistry, ''Melting point, Freezing point, Boiling point'' [Online], Available: http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch14/melting.php#melt</ref> For example, in theory pure water has a melting point ''and'' freezing point at [[celsius|0°C]] under [[standard test conditions]], but slight measurable differences tend to arise.

While the solid is in the process is melting, its temperature will not change. This is known as [[latent heat]], which is the opposite of [[sensible heat]]. The transition between the solid and the liquid is so sharp for small samples of a pure substance that melting points can be measured to 0.1°C.<ref name=pur/> Therefore melting points can be used to accurately measure the purity of a substance.<ref>Encyclopaedia Brittanica, ''Melting point'' [Online], Available: http://www.britannica.com/EBchecked/topic/374185/melting-point</ref>

==References==
{{reflist}}
[[Category:Uploaded]]