heat of combustion

American  

noun

1. Physics. calorific value.

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heat of combustion British  

noun

1. chem the heat evolved when one mole of a substance is burnt in oxygen at constant volume

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heat of combustion Scientific  

1. The amount of heat released when one mole of a substance is completely oxidized.

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Example Sentences

Availability of Heat of Combustion.—Taking the value 1.13 kilogrammetres per kilo-calorie for 1� C. fall of temperature at 100� C., Carnot attempted to estimate the possible performance of a steam-engine receiving heat at 160� C. and rejecting it at 40� C. Assuming the performance to be simply proportional to the temperature fall, the work done for 120� fall would be 134 kilogrammetres per kilo-calorie.

From Project Gutenberg

The problem in the case of an engine using a separate working fluid, like a steam-engine, is to find what must be the temperature θ″ of the boiler in order to obtain the largest possible fraction of the heat of combustion in the form of work.

From Project Gutenberg

Carnot foresaw that in order to utilize a larger percentage of the heat of combustion it would be necessary to employ a series of working fluids, the waste heat from one boiler and condenser serving to supply the next in the series.

From Project Gutenberg

In reality the fraction of the heat of combustion available, even in an ideal engine and apart from practical limitations, is much less than might be inferred from the efficiency formula of the Carnot cycle.

From Project Gutenberg

The gain by increased temperature range has been comparatively small owing to limitations of pressure, and the best modern steam-engines do not utilize more than 20% of the heat of combustion.

From Project Gutenberg