Melting Point - Revision history

Ellen References at 10:19, 14 December 2019

2019-12-14T10:19:14Z

Ellen References at 17:10, 22 November 2019

2019-11-22T17:10:32Z

Ellen References at 11:41, 8 November 2019

2019-11-08T11:41:21Z

NRJC at 10:58, 23 January 2019

2019-01-23T10:58:57Z

NRJC: Created page with "==Key Stage 4== ===Meaning=== '''Melting point''' is the temperature at which a solid can become a liquid. ===About Melting Points=== : Different substances h..."

2018-12-27T10:31:05Z

Created page with "==Key Stage 4== ===Meaning=== '''Melting point''' is the temperature at which a solid can become a liquid. ===About Melting Points=== : Different substances h..."

New page

==Key Stage 4==
===Meaning===
'''Melting point''' is the [[temperature]] at which a [[solid]] can become a [[liquid]].

===About Melting Points===
: Different [[substance]]s have different '''melting points'''.
: The '''melting point''' of a [[substance]] is determined by the strength of the [[bond]]s which hold the [[particle]]s in fixed positions in a [[solid]]. The stronger the [[bond]]s the higher the '''melting point'''.
: When a [[substance]] is [[heated]] to its '''melting point''' it will remain at this constant [[temperature]] until all of the [[solid]] has [[melting|melted]].
: The '''melting point''' of [[pure]] [[water]] [[ice]] is 0[[°C]] or 273 [[Kelvin]].
: Adding [[salt]] to [[ice]] can lower its '''melting point''', causing it to [[melting|melt]] at a lower [[temperature]].
: [[Transition Metal]]s generally have very high '''melting points''', except for [[Mercury (Element)|Mercury]] which is [[liquid]] at [[Room Temperature|room temperature]].

← Older revision		Revision as of 10:19, 14 December 2019
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	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Melting points, pages 147, 149, GCSE Combined Science, Pearson Edexcel '']		:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Melting points, pages 147, 149, GCSE Combined Science, Pearson Edexcel '']
	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Melting points; molecular compounds, page 42, GCSE Chemistry, Pearson, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Melting points; molecular compounds, page 42, GCSE Chemistry, Pearson, Edexcel '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Melting points, pages 41, 76, 132, 134, 210-211, Gateway GCSE Chemistry, Oxford, OCR '']

← Older revision		Revision as of 17:10, 22 November 2019
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	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; purity analysis, pages 180-181, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']		:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; purity analysis, pages 180-181, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; transition elements, page 32, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']		:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; transition elements, page 32, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+
		+	====Edexcel====
		+
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Melting point, pages 3, 5, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Melting point; ionic compounds, page 182, GCSE Combined Science, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Melting point; ionic compounds, page 38, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Melting point; molecular compounds, page 186, GCSE Combined Science, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Melting points, pages 147, 149, GCSE Combined Science, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Melting points; molecular compounds, page 42, GCSE Chemistry, Pearson, Edexcel '']

← Older revision		Revision as of 11:41, 8 November 2019
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	===Detecting Purity===		===Detecting Purity===
	: The [[Pure\|purity]] of a sample can be determined by [[observing]] its [[Melting Point\|melting point]]. If the [[Melting Point\|melting point]] is spread over a range of [[temperature]]s or different from the known values for the [[pure]] [[substance]] then the sample is not [[pure]]. For example to test if a sample of [[Water]] is [[pure]] it can be [[melting\|melted]] from [[Ice]] which should happen at exactly 0°C if it does not then it is not [[pure]].		: The [[Pure\|purity]] of a sample can be determined by [[observing]] its [[Melting Point\|melting point]]. If the [[Melting Point\|melting point]] is spread over a range of [[temperature]]s or different from the known values for the [[pure]] [[substance]] then the sample is not [[pure]]. For example to test if a sample of [[Water]] is [[pure]] it can be [[melting\|melted]] from [[Ice]] which should happen at exactly 0°C if it does not then it is not [[pure]].
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points, pages 36-37, 47, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Melting points, pages 80-81, 84, GCSE Physics; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; alkali metals, page 26, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; halogens, page 28, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; purity analysis, pages 180-181, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Melting points; transition elements, page 32, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']

← Older revision		Revision as of 10:58, 23 January 2019
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	: Adding [[salt]] to [[ice]] can lower its '''melting point''', causing it to [[melting\|melt]] at a lower [[temperature]].		: Adding [[salt]] to [[ice]] can lower its '''melting point''', causing it to [[melting\|melt]] at a lower [[temperature]].
	: [[Transition Metal]]s generally have very high '''melting points''', except for [[Mercury (Element)\|Mercury]] which is [[liquid]] at [[Room Temperature\|room temperature]].		: [[Transition Metal]]s generally have very high '''melting points''', except for [[Mercury (Element)\|Mercury]] which is [[liquid]] at [[Room Temperature\|room temperature]].
		+
		+	===Detecting Purity===
		+	: The [[Pure\|purity]] of a sample can be determined by [[observing]] its [[Melting Point\|melting point]]. If the [[Melting Point\|melting point]] is spread over a range of [[temperature]]s or different from the known values for the [[pure]] [[substance]] then the sample is not [[pure]]. For example to test if a sample of [[Water]] is [[pure]] it can be [[melting\|melted]] from [[Ice]] which should happen at exactly 0°C if it does not then it is not [[pure]].