HEATING VALUE of a gas?? what does it mean??

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Rizu

Joined Nov 1, 2012
11
I am studying an experiment for lab and I got this " Heating Value of a gas" ??
My question is what does it mean??
 

jpanhalt

Joined Jan 18, 2008
7,913
In some sources, heating value may be expressed in BTU or kcal/mass (not volume) (http://www.engineeringtoolbox.com/gross-net-heating-values-d_420.html). It makes a big difference, as the same volume of gases of different molecular weights weigh in proportion to the molecular weights. Thus, the heating value of methane and propane are similar when compared on the basis of mass/weight, but are greatly different when compared on the basis of equal volumes (propane being much more). It is important to understand the units being used.

John
 
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