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===About Gas Pressure===
: '''Pressure in gases''' is caused by particles [[particle]]s [[Collide|colliding]] with the [[object]] or walls of the container.
: Each time a [[particle]] in the [[gas]] hits an [[object]] or the walls it provides a [[force]].
: The more [[particle]]s that hit the [[object]] or walls, the bigger the overall [[force]] it will experience.
| style="height:20px; width:200px; text-align:center;" |Increasing the number of particles in the container.
|}
===Extra Information===
{{#ev:youtube|https://www.youtube.com/watch?v=VDf00z8sMFw}}
==Key Stage 4==
===Meaning===
'''Gas pressure''' is the [[pressure]] on an [[object]] caused by a [[gas]].
===About Gas Pressure===
: '''Pressure in gases''' is caused by [[particle]]s [[Collide|colliding]] with the [[object]] or walls of the container.
: The [[pressure]] from a [[gas]] always acts at [[Right Angle|right angles]] to the surface.
: Each time a [[particle]] in the [[gas]] hits an [[object]] or the walls it changes [[momentum]] which causes a [[force]] to be applied to the surface.
: The more [[particle]]s that hit the surface, the bigger the overall [[force]] it will experience.
: The faster the [[particle]]s hit the [[object]] or walls, the bigger the [[force]] that each [[particle]] [[collide]]s with.
: The frequency and [[speed]] with which the [[particle]]s collide with the surface determines the [[pressure]] on that surface.
{| class="wikitable"
|-
|[[File:GasPressure1.png|center|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |The [[Particle Model|particle model]] of a [[gas]] showing the [[particle]]s as red balls and their speed and direction shown by the arrows. The longer the arrows the faster they are moving.
|}
: The '''gas pressure''' can be increased in three ways:
{| class="wikitable"
|-
|[[File:GasPressure3.png|center|200px]]
|[[File:GasPressure2.png|center|200px]]
|[[File:GasPressure4.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |Increasing the [[temperature]] of the [[gas]] which makes the [[particle]]s move faster. This causes the particles to hit the walls of the container more often and with a greater [[force]].
| style="height:20px; width:200px; text-align:center;" |Increasing the number of [[particle]]s in the container.
| style="height:20px; width:200px; text-align:center;" |Decreasing the [[Volume (Space)|volume]] of the container. The additional [[pressure]] caused by the [[force]] causes the [[gas]] to be [[compression|compressed]]. The [[force]] does [[Work Done|work]] on the [[gas]] increasing its [[temperature]].
|}
===References===
====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 ''Gas pressure, pages 330-1, GCSE Combined Science Trilogy 1, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Gas pressure, pages 78-9, GCSE Physics, Hodder, 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 ''Gas pressure, pages 86-89, GCSE Physics; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Gas pressure; demonstration of, page 79, GCSE Physics, 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 ''Gas pressure; effect on equilibrium position, pages 162-3, 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 ''Gas pressure; effect on rate of reactions, pages 152, 154, GCSE Chemistry, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Gas pressure; expanding and compressing gases, pages 79-80, GCSE Physics, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Gas pressure; explanation of, page 80, GCSE Physics, Hodder, AQA '']
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Gas pressure, page 34-35, 37, Gateway GCSE Physics, Oxford, OCR '']