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document Heat of Combustion
The heat of combustion is defined to be the heat released when one mole of a compound undergoes complete combustion in O2.  This will usually be an exothermic process, as shown in the combustion of ethane below.  This measurement can be found experimentally using a bomb...
11 Sep, 2012 Comments: 0
document Heat of Formation
v\:* { behavior: url(#default#VML) } o\:* { behavior: url(#default#VML) } .shape { behavior: url(#default#VML) } Defined to be the heat released if one mole of a compound were formed from its component elements in their standard...
22 Jan, 2011 Comments: 0
document Heat of Hydrogenation
The heat of hydrogenation is defined as the heat released upon the addition of H2 to one mole of a compound (e.g. an alkene or alkyne) to generate the corresponding alkane.  This process will usually be an exothermic process, as shown in the example below for ethene to ethane. ...
25 Jan, 2011 Comments: 0
document Heat of Reaction
The heat of reaction is defined as the heat evolved during a particular reaction. If heat is released during this process, then the reaction is exothermic and if heat is absorbed during this process, then the reaction is endothermic.  The study of heats of reaction are...
25 Jan, 2011 Comments: 0
document Thermodynamics Basics
There are two very important fundamental thermodynamic equations that you should know and understand that relate various thermodynamic terms. DG = DH - TDS DG = -RT ln K DG is the change in the free energy of the system. DH is the change in the enthalpy of the system. ...
12 Feb, 2012 Comments: 0
document Hess's Law
Although not specifically covered in most organic text books, Hess's Law can be very useful when investigating the thermodynamics of reactions.  Hess's Law can be expressed by the following expression and diagram: "The enthalpy change for a reaction (DHro) that converts starting materials...
12 Feb, 2012 Comments: 0

Department of Chemistry & Chemical Biology