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

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heat of formation

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)

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)

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)

Unfortunately there is still some doubt about the heat of formation of calcium carbide, De Forcrand returning it as -0.65 calorie, and Gin as +3.9 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)