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

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)

Its heat of formation from its elements is +156.1 calories.

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

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)

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

The heat of formation of nitro-glycerine, as deduced from the heat of combustion by M. Longuinine, is 432 calories for 1 grm.; and the heat of combustion equals 1,576 cals. for 1 grm.

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