History of Enthalpy

	Revision 3 . . December 16, 2001 8:17 pm by Sodium [enthalpy changes]
	Revision 2 . . December 16, 2001 8:10 pm by Taw [linkified]
	Revision 1 . . December 16, 2001 11:59 am by (logged).156.135.xxx [first article]

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Added: 7a8,16

An enthalpy change (ΔH) in chemistry decribes the heat energy exchange with the surroundings at constant pressure. It can provide a useful guide to the feasibility of a reaction taking place. There are a number of different types of standard enthalpy changes: *[standard enthalpy change of reaction]? *[standard enthalpy change of combustion]? *[standard enthalpy change of formation]? *[standard enthalpy change of neutralisation]?