Exothermic - Revision history

Ellen References at 07:50, 7 December 2019

2019-12-07T07:50:05Z

Ellen References at 15:52, 19 November 2019

2019-11-19T15:52:58Z

Ellen References at 14:30, 15 November 2019

2019-11-15T14:30:58Z

NRJC: /* About Exothermic Processes */

2019-06-10T11:08:44Z

‎About Exothermic Processes

NRJC: /* Higher */

2019-01-31T11:33:54Z

‎Higher

NRJC: /* Higher */

2019-01-31T11:33:43Z

‎Higher

NRJC: /* Foundation */

2019-01-14T15:48:39Z

‎Foundation

NRJC: /* Examples */

2019-01-14T15:36:45Z

‎Examples

NRJC: /* Examples */

2019-01-14T15:34:40Z

‎Examples

NRJC: /* Higher */

2019-01-14T15:28:36Z

‎Higher

← Older revision		Revision as of 07:50, 7 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 ''Exothermic reactions; equilibrium, page 239, 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 ''Exothermic reactions; equilibrium, page 239, 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 ''Exothermic reactions; equilibrium, page 95, 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 ''Exothermic reactions; equilibrium, page 95, GCSE Chemistry, Pearson, Edexcel '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/1782945660/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945660&linkCode=as2&tag=nrjc-21&linkId=83aa4500ad7759e7f401a1c5ba5df758 ''Exothermic reactions, page 20, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Exothermic reactions, page 41, 42, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/0198359810/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359810&linkCode=as2&tag=nrjc-21&linkId=d768d99f1a06f7c12fab40e5aef85a55 ''Exothermic reactions, page 41, Gateway GCSE Biology, Oxford, 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 ''Exothermic reactions, pages 102-103, 105, 186, Gateway GCSE Chemistry, Oxford, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Exothermic reactions, pages 18, 111, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']

← Older revision		Revision as of 15:52, 19 November 2019
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	:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f283 ''Exothermic, page 36-7, GCSE Biology; Student Book, Collins, AQA '']		:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f283 ''Exothermic, page 36-7, GCSE Biology; Student Book, Collins, AQA '']
	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Exothermic; reaction profiles, page 131, GCSE Chemistry, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Exothermic; reaction profiles, page 131, GCSE Chemistry, Hodder, AQA '']
		+
		+	====Edexcel====
		+
		+	:[https://www.amazon.co.uk/gp/product/1292120207/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120207&linkCode=as2&tag=nrjc-21&linkId=22455ff53961978667722edaa64c0be5 ''Exothermic reactions, page 170, GCSE Biology, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc-21&linkId=dedef775c6a43dbb0a609441525adac0 ''Exothermic reactions, page 270, GCSE Biology, CGP, 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 ''Exothermic reactions, pages 118, 252, 258-259, GCSE Combined Science, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Exothermic reactions, pages 134, 136, GCSE Combined Science; The Revision Guide, CGP, 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 ''Exothermic reactions, pages 138, 144-145, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Exothermic reactions, pages 243, 244, 248-250, GCSE Chemistry, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Exothermic reactions, pages 83, 85, GCSE Chemistry; The Revision Guide, CGP, 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 ''Exothermic reactions; equilibrium, page 239, 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 ''Exothermic reactions; equilibrium, page 95, GCSE Chemistry, Pearson, Edexcel '']

← Older revision		Revision as of 14:30, 15 November 2019
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	Once the [[Chemical Reaction\|reaction]] is complete 97kJ will be released.		Once the [[Chemical Reaction\|reaction]] is complete 97kJ will be released.
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Exothermic reaction, pages 173-5, 178-81, 211,216-7, GCSE Chemistry; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Exothermic reactions, page 134, GCSE Biology; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Exothermic reactions, page 165, GCSE Combined Science Trilogy; Biology, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Exothermic reactions, page 179, GCSE Biology, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Exothermic reactions, page 61, GCSE Biology; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Exothermic reactions, pages 106, 231-2, GCSE Combined Science Trilogy 1, Hodder, 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 ''Exothermic reactions, pages 112-113, 114-119, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Exothermic reactions, pages 129-30, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Exothermic reactions, pages 152, 154, 155, 157, 159, 182-184, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Exothermic reactions, pages 177, 179, 180, 182, 184, 214-216, GCSE Chemistry, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d121 ''Exothermic reactions, pages 61-63, 72, 73, GCSE Chemistry; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Exothermic reactions; reaction profiles, pages 233, 235, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f283 ''Exothermic, page 36-7, GCSE Biology; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Exothermic; reaction profiles, page 131, GCSE Chemistry, Hodder, AQA '']

@@ Line 11: / Line 11: @@
 | style="height:20px; width:500px; text-align:center;" |The [[energy]] stored in the [[reactant]]s is released in the [[Chemical Reaction|chemical reaction]] making the [[material]] increase in [[temperature]]. The [[product]]s now have less [[energy]] than the [[reactant]]s.
 |}
-: [[Freezing]], [[Condensing]] and [[Depositing]] are [[exothermic]] changes because they release [[energy]] when they happen. The [[material]] has less after they have happened. However, there is usually no increase in [[temperature]] because the [[material]] is usually cooled to [[State Change|change state]].
+: [[Freezing]], [[Condensing]] and [[Depositing]] are [[exothermic]] changes because they release [[energy]] when they happen. The [[material]] has less [[energy]] after they have happened. However, there is usually no increase in [[temperature]] because the [[material]] is usually cooled to [[State Change|change state]] because the surroundings are colder than the [[material]] during this process.
 ==Key Stage 4==

@@ Line 32: / Line 32: @@
 : In a [[Chemical Reaction|chemical reaction]] [[energy]] is needed to break the [[Chemical Bond|chemical bonds]] holding the [[atom]]s together.
 : In an [[exothermic]] [[Chemical Reaction|reaction]] [[energy]] is then released as [[atom]]s form new [[Chemical Bond|chemical bonds]].
-: In an [[exothermic]] [[Chemical Reaction|reaction]] more [[energy]] is released in the formation of new [[Chemical Bond|bonds]] in the [[products]] than is taken in in the breaking of [[Chemical Bond|bonds]] in the [[reactant]]s. So there is a net output of [[energy]].
+: In an [[exothermic]] [[Chemical Reaction|reaction]] more [[energy]] is released in the formation of new [[Chemical Bond|bonds]] in the [[product]] than is taken in in the breaking of [[Chemical Bond|bonds]] in the [[reactant]]s. So there is a net output of [[energy]].
 ===Examples===

@@ Line 28: / Line 28: @@
 | style="height:20px; width:500px; text-align:center;" |To start the [[Chemical Reaction|reaction]] an [[Activation Energy|activation energy]] is needed. This is usually achieved by initially [[heating]] the [[reactant]]s. Once the [[Chemical Reaction|reaction]] starts the [[energy]] stored in the [[reactant]]s is released in the [[Chemical Reaction|chemical reaction]] making the [[material]] increase in [[temperature]]. The [[product]]s now have less [[energy]] than the [[reactant]]s.
 |}
 ====Higher====
 : In a [[Chemical Reaction|chemical reaction]] [[energy]] is needed to break the [[Chemical Bond|chemical bonds]] holding the [[atom]]s together.

@@ Line 35: / Line 35: @@
 ===Examples===
 ====Higher====
 {| class="wikitable"
 |-
@@ Line 51: / Line 59: @@
 | style="height:20px; width:100px; text-align:center;" |C=O
 | style="height:20px; width:150px; text-align:center;" |799
 |}
@@ Line 73: / Line 74: @@
 Once the [[Chemical Reaction|reaction]] is complete 806kJ will be released.
 {| class="wikitable"
@@ Line 87: / Line 96: @@
 | style="height:20px; width:100px; text-align:center;" |N-H
 | style="height:20px; width:150px; text-align:center;" |391
 |}

← Older revision		Revision as of 15:34, 14 January 2019
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	Once the [[Chemical Reaction\|reaction]] is complete 806kJ will be released.		Once the [[Chemical Reaction\|reaction]] is complete 806kJ will be released.
		+
		+	{\| class="wikitable"
		+	\|-
		+	\| style="height:20px; width:100px; text-align:center;" \|'''Bond'''
		+	\| style="height:20px; width:150px; text-align:center;" \|'''Energy in kJ/mol'''
		+	\|-
		+	\| style="height:20px; width:100px; text-align:center;" \|H-H
		+	\| style="height:20px; width:150px; text-align:center;" \|436
		+	\|-
		+	\| style="height:20px; width:100px; text-align:center;" \|N≡N
		+	\| style="height:20px; width:150px; text-align:center;" \|941
		+	\|-
		+	\| style="height:20px; width:100px; text-align:center;" \|N-H
		+	\| style="height:20px; width:150px; text-align:center;" \|391
		+	\|}
		+
		+	{\| class="wikitable"
		+	\|-
		+	\|[[File:StructuralDiagramHydrogen+Nitrogen.png\|center\|500px]]
		+	\|-
		+	\| style="height:20px; width:200px; text-align:center;" \|In the [[Chemical Reaction\|reaction]] between [[Hydrogen]] and [[Nitrogen]] the [[Chemical Bond\|chemical bonds]] in the [[reactant]]s must be broken first before the [[Chemical Bond\|bonds]] in the [[product]]s are formed.
		+	\|}
		+
		+	There are 3 H-H [[Chemical Bond\|bonds]] and 1 N≡N [[Chemical Bond\|bonds]].
		+
		+	3 x 436 + 1 x 941 = 2249kJ
		+
		+	Therefore 2249kJ/mol are needed to break the [[Chemical Bond\|bonds]] in the [[reactant]]s.
		+
		+	There are 6 N-H [[Chemical Bond\|bonds]].
		+
		+	6 x 391 = 2346kJ
		+
		+	Therefore 2346kJ/mol is released when the [[Chemical Bond\|bonds]] in the [[product]]s form.
		+
		+	Once the [[Chemical Reaction\|reaction]] is complete 97kJ will be released.