Homogeneous vs heterogeneous - Revision history

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	<onlyinclude>In most technical applications '''homogeneous''' means that the properties of a system are the uniform throughout the entire system; '''heterogeneous''' (also '''inhomogeneous''') means that the properties change within the system.<ref>A Dictionary of Chemistry (7 ed) by Richard Rennie, published 2016.</ref> Any system with two [[phase change\|phase]]s like [[ice]] and [[water]] are said to be heterogeneous.</onlyinclude>		<onlyinclude>In most technical applications '''homogeneous''' means that the properties of a system are the uniform throughout the entire system; '''heterogeneous''' (also '''inhomogeneous''') means that the properties change within the system.<ref>A Dictionary of Chemistry (7 ed) by Richard Rennie, published 2016.</ref> Any system with two [[phase change\|phase]]s like [[ice]] and [[water]] are said to be heterogeneous.</onlyinclude>

	For example, homogeneous systems have the same composition, [[density]] and [[pressure]] throughout. ~~While a~~ homogeneous system will often ~~has~~ more than one component (like salt and water), the mixture will be uniform throughout the sample~~. For a heterogeneous system there~~'~~s clumping of salt in the salt water, or parts of the water that are saltier than others. The figures 1 and 2 below show heterogeneous and homogeneous systems~~.		For example, homogeneous systems have the same composition, [[density]] and [[pressure]] throughout. A homogeneous system will often have more than one component (like salt and water), but the mixture will be ''uniform throughout the sample''.

	<gallery caption="Heterogeneous and Homogeneous ~~gas particles~~" ~~mode=packed heights=250px~~>		For a heterogeneous system there may be clumping of salt in the salt water, or parts of the water that are saltier than others. Figures 1 and 2 below show how heterogeneous and homogeneous systems differ.
	File:heterogeneous.PNG\|Figure 1. A heterogeneous mixture of molecules in a [[gas]] ~~because~~ the density (and pressure) is different throughout.<ref name = imageref>Image made by a member of the energy education team by using the PhET resource found here: https://phet.colorado.edu/en/simulation/gas-properties, Accessed July 14th, 2017.</ref>
	File:homogeneous.PNG\|Figure 2. A homogeneous mixture of molecules in a [[gas]] ~~because~~ the density (and pressure) is uniform throughout.<ref name = imageref/>		<gallery mode="packed" heights="250px" caption="Heterogeneous and Homogeneous Gas Particles">
			File:heterogeneous.PNG\|Figure 1. A heterogeneous mixture of molecules in a [[gas]]. Note that: the density (and pressure) is different throughout.<ref name="imageref">Image made by a member of the energy education team by using the PhET resource found here: https://phet.colorado.edu/en/simulation/gas-properties, Accessed July 14th, 2017.</ref>
			File:homogeneous.PNG\|Figure 2. A homogeneous mixture of molecules in a [[gas]]. Here, the density (and pressure) is uniform throughout.<ref name="imageref" />
	</gallery>		</gallery>

	These terms are also important for catalysis~~, for~~ information on homogeneous vs. heterogeneous catalysis please ~~see~~ [http://www.chemguide.co.uk/physical/catalysis/introduction.html ~~here~~].		These terms are also important for catalysis. For information on homogeneous vs. heterogeneous catalysis please visit the [http://www.chemguide.co.uk/physical/catalysis/introduction.html Chem Guide].

			== For Further Reading ==

			* [[Pressure]]
			* [[Density]]
			* [[Phase change]]
			* Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
			[[Category: Uploaded]]

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Jmdonev at 21:43, 28 July 2017

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[[Category:Done 2017-07-01]]
<onlyinclude>In most technical applications '''homogeneous''' means that the properties of a system are the uniform throughout the entire system; '''heterogeneous''' (also '''inhomogeneous''') means that the properties change within the system.<ref>A Dictionary of Chemistry (7 ed) by Richard Rennie, published 2016.</ref> Any system with two [[phase change|phase]]s like [[ice]] and [[water]] are said to be heterogeneous.</onlyinclude>

For example, homogeneous systems have the same composition, [[density]] and [[pressure]] throughout. While a homogeneous system will often has more than one component (like salt and water), the mixture will be uniform throughout the sample. For a heterogeneous system there's clumping of salt in the salt water, or parts of the water that are saltier than others. The figures 1 and 2 below show heterogeneous and homogeneous systems.

<gallery caption="Heterogeneous and Homogeneous gas particles" mode=packed heights=250px>
File:heterogeneous.PNG|Figure 1. A heterogeneous mixture of molecules in a [[gas]] because the density (and pressure) is different throughout.<ref name = imageref>Image made by a member of the energy education team by using the PhET resource found here: https://phet.colorado.edu/en/simulation/gas-properties, Accessed July 14th, 2017.</ref>
File:homogeneous.PNG|Figure 2. A homogeneous mixture of molecules in a [[gas]] because the density (and pressure) is uniform throughout.<ref name = imageref/>
</gallery>

These terms are also important for catalysis, for information on homogeneous vs. heterogeneous catalysis please see [http://www.chemguide.co.uk/physical/catalysis/introduction.html here].
==References==
{{reflist}}