heat of formation

British  

noun

1. chem the heat evolved or absorbed when one mole of a compound is formed from its constituent atoms

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Example Sentences

The marked activity of chloramine as a chlorinating agent could be predicated from its heat of formation, which is 8,230 calories.

From Chlorination of Water by Race, Joseph

By causing compressed acetylene to dissociate under the influence of an electric spark, Mixter measured its heat of formation as -53.3 calories.

From Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power by Leeds, F. H. (Frank Henley)

M. Berthelot gives the heat of formation of nitro-starch as 812 cals. for 1 grm., and the heat of total combustion as equal to 706.5 cals. for 207 grms., or for 1 grm.

From Nitro-Explosives: A Practical Treatise by Sanford, P. Gerald (Percy Gerald)

If the water remains gaseous, as it must do in a flame, the heat of formation is reduced by about 10 calories.

From Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power by Leeds, F. H. (Frank Henley)

The other possible chloramines should be even more active as the heat of formation of these compounds are: Dichloramine NHCl2 — 36,780 calories.

From Chlorination of Water by Race, Joseph