Bond Energy - Revision history

Ellen References at 11:22, 1 December 2019

2019-12-01T11:22:21Z

NRJC at 14:36, 2 November 2019

2019-11-02T14:36:43Z

NRJC at 14:36, 2 November 2019

2019-11-02T14:36:22Z

NRJC at 12:04, 28 October 2019

2019-10-28T12:04:13Z

NRJC at 19:22, 3 April 2019

2019-04-03T19:22:00Z

NRJC at 16:40, 14 January 2019

2019-01-14T16:40:38Z

NRJC: /* Examples */

2019-01-14T16:40:29Z

‎Examples

NRJC: Created page with "==Key Stage 4== ===Meaning=== '''Bond Energy''' is the energy needed to break a chemical bond between two atoms. ===About Bond Energy=== : When Ch..."

2019-01-14T16:38:37Z

Created page with "==Key Stage 4== ===Meaning=== '''Bond Energy''' is the energy needed to break a chemical bond between two atoms. ===About Bond Energy=== : When Ch..."

New page

==Key Stage 4==
===Meaning===
'''Bond Energy''' is the [[energy]] needed to break a [[Chemical Bond|chemical bond]] between two [[atom]]s.

===About Bond Energy===
: When [[Chemical Bond|chemical bonds]] are formed [[energy]] is released to the surroundings increasing the [[temperature]]. An [[exothermic]] process]].
: To break [[Chemical Bond|chemical bonds]] [[energy]] is needed to separate the [[atom]]s, decreasing the [[temperature]] of the [[surroundings]]. An [[endothermic]] process]].

===Examples===
Some common '''bond energies''' are given in the table below.
{| 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;" |O=O
| style="height:20px; width:150px; text-align:center;" |498
|-
| 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;" |C-C
| style="height:20px; width:150px; text-align:center;" |347
|-
| style="height:20px; width:100px; text-align:center;" |C=C
| style="height:20px; width:150px; text-align:center;" |614
|-
| style="height:20px; width:100px; text-align:center;" |C≡C
| style="height:20px; width:150px; text-align:center;" |839
|-
| style="height:20px; width:100px; text-align:center;" |C-H
| style="height:20px; width:150px; text-align:center;" |413
|-
| style="height:20px; width:100px; text-align:center;" |O-H
| style="height:20px; width:150px; text-align:center;" |464
|-
| style="height:20px; width:100px; text-align:center;" |C=O
| style="height:20px; width:150px; text-align:center;" |799
|-
| style="height:20px; width:100px; text-align:center;" |Cl-Cl
| style="height:20px; width:150px; text-align:center;" |243
|-
| style="height:20px; width:100px; text-align:center;" |H-Cl
| style="height:20px; width:150px; text-align:center;" |432
|-
| style="height:20px; width:100px; text-align:center;" |N-H
| style="height:20px; width:150px; text-align:center;" |391
|}

← Older revision		Revision as of 11:22, 1 December 2019
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	:[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 ''Bonds; energy calculations, page 147, 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 ''Bonds; energy calculations, page 147, 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 ''Bonds; energy calculations, page 261, 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 ''Bonds; energy calculations, page 261, GCSE Combined Science, Pearson Edexcel '']
		+
		+	====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 ''Bond energies, page 42, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway '']
		+	:[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 ''Bond energies, pages 106-107, Gateway GCSE Chemistry, Oxford, OCR '']

← Older revision		Revision as of 14:36, 2 November 2019
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	:[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 ''Bond energy, page 147, 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 ''Bond energy, page 147, 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 ''Bond energy, page 261, 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 ''Bond energy, page 261, 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 ''Bonds; energy calculations, page 147, 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 ''Bonds; energy calculations, page 261, GCSE Combined Science, Pearson Edexcel '']

← Older revision		Revision as of 14:36, 2 November 2019
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	:[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 ''Bond energies, pages 235-7, GCSE Combined Science Trilogy 1, Hodder, 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 ''Bond energies, pages 235-7, 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 ''Bond energy, pages 117-119, 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 ''Bond energy, pages 117-119, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+
		+	====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 ''Bond energies, page 136, GCSE Combined Science; The Revision Guide, 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 ''Bond energies, page 85, GCSE Chemistry; The Revision Guide, CGP, 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 ''Bond energies, pages 248-250, GCSE Chemistry, 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 ''Bond energy, page 147, 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 ''Bond energy, page 261, GCSE Combined Science, Pearson Edexcel '']

← Older revision		Revision as of 12:04, 28 October 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/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d62 ''Bond energies, page 63, GCSE Chemistry; The Revision Guide, CGP, 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 ''Bond energies, pages 133-5, 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 ''Bond energies, pages 158, 159, 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 ''Bond energies, pages 183, 184, GCSE Chemistry, 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 ''Bond energies, pages 235-7, 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 ''Bond energy, pages 117-119, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']

← Older revision		Revision as of 16:40, 14 January 2019
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	\| style="height:20px; width:150px; text-align:center;" \|391		\| style="height:20px; width:150px; text-align:center;" \|391
	\|}		\|}
		+
		+	These can be used to calculate the [[energy]] released per [[mole]] in a [[Chemical Reaction\|chemical reaction]].
		+
		+	'''Example 1'''
		+	{\| class="wikitable"
		+	\|-
		+	\|[[File:StructuralDiagramMethane+Oxygen.png\|center\|500px]]
		+	\|-
		+	\| style="height:20px; width:200px; text-align:center;" \|In the [[Chemical Reaction\|reaction]] between [[Methane]] and [[Oxygen]] 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 4 C-H [[Chemical Bond\|bonds]] and 2 O=O [[Chemical Bond\|bonds]].
		+
		+	4 x 413 + 2 x 498 = 2648kJ
		+
		+	Therefore 2648kJ/mol are needed to break the [[Chemical Bond\|bonds]] in the [[reactant]]s.
		+
		+	There are 2 C=O [[Chemical Bond\|bonds]] and 4 O-H [[Chemical Bond\|bonds]].
		+
		+	2 x 799 + 4 x 464 = 3454kJ
		+
		+	Therefore 3454kJ/mol is released when the [[Chemical Bond\|bonds]] in the [[product]]s form.
		+
		+	Once the [[Chemical Reaction\|reaction]] is complete 806kJ will be released.
		+
		+	'''Example 2'''
		+	{\| 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.

@@ Line 5: / Line 5: @@
 ===About Bond Energy===
 : When [[Chemical Bond|chemical bonds]] are formed [[energy]] is released to the surroundings increasing the [[temperature]]. An [[exothermic]] process]].
-: To break [[Chemical Bond|chemical bonds]] [[energy]] is needed to separate the [[atom]]s, decreasing the [[temperature]] of the [[surroundings]]. An [[endothermic]] process]].
+: To break [[Chemical Bond|chemical bonds]] [[energy]] is needed to separate the [[atom]]s, decreasing the [[temperature]] of the surroundings. An [[endothermic]] process]].
 ===Examples===

@@ Line 1: / Line 1: @@
-==Key Stage 4==
+==Key Stage 4 Higher==
 ===Meaning===
 '''Bond Energy''' is the [[energy]] needed to break a [[Chemical Bond|chemical bond]] between two [[atom]]s.