Changes

==Key Stage 4=====Meaning===[[File:FuelCell.png|right|300px|thumb|A [[diagram]] of a simple '''fuel cell'''.]]A '''fuel cell''' is a device which can combine [[hydrogenHydrogen]] and [[oxygenOxygen]] to make produce a [[Potential Difference]]. ===About Fuel Cells===: In a '''fuel cell''' [[Oxygen]] is combined with [[Hydrogen]] to produce [[Water]].: '''Fuel cells''' are designed to combine [[Hydrogen Ion (Chemistry)|Hydrogen ions]] and [[Hydroxide Ion|Hydroxide ions]] to produce a [[Potential Difference|potential difference]]between two [[electrode]]s.: '''Fuel cells''' may be used in electric cars and were used on the Space Shuttle. ===Advantages===*No [[Carbon Dioxide]] is produced.*Refilling with [[Hydrogen]] is quicker than recharging a [[battery]].*They can be made in many different sizes for different uses. ===Disadvantages===*[[Hydrogen]] must be stored as a [[Compressed Gas]].*[[Hydrogen]] is highly [[flammable]].*[[Hydrogen]] is made by [[electrolysis]] which requires [[electricity]], which is often made by power stations burning [[fuel]] and producing [[Carbon Dioxide]]. ===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 ''Fuel cell, pages 172-3, 184-5, GCSE Chemistry; Student Book, Collins, 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=9e29fad914244909903e5e93f8a01d132 ''Fuel cells, page 65, GCSE Chemistry; The Revision Guide, CGP, 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 ''Fuel cells, pages 122-123, 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 ''Fuel cells, pages 138-9, GCSE Chemistry, Hodder, 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 ''Fuel cells, pages 190, 191, GCSE Chemistry, CGP, AQA ''] ====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 ''Fuel cells, page 71, GCSE Chemistry; 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 ''Fuel cells, pages 124-125, 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 ''Fuel cells, pages 206, 207, GCSE Chemistry, CGP, 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 ''Fuel cells, page 95, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR '']