“calorific value”的概念、定义、翻译、参考文献-科学参考

calorific value

Physics

The heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram (MJ kg⁻¹). They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units used in this context are kilojoules per gram (kJ g⁻¹), although Calories (kilocalories) are often still used in nontechnical contexts. Calorific values are measured using a bomb calorimeter.

Chemistry

The heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram (MJ kg⁻¹). They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units here are kilojoules per gram (kJ g⁻¹), although Calories (kilocalories) are often still used in nontechnical contexts. Calorific values are measured using a bomb calorimeter.

Chemical Engineering

The heating value or heat of combustion of a combustible material in oxygen. Determined using a bomb calorimeter, the calorific value is used as a measure of the energy content of a material such as a hydrocarbon fuel or foodstuff. The calorific values of fuels are usually expressed in joules per unit mass such as MJ kg⁻¹. Hydrocarbon gases such as methane are expressed per unit volume such as MJ m⁻³ with reference to s.t.p. to allow for temperature and pressure variations.

Biology

The heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram (MJ kg⁻¹). They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units here are kilojoules per gram (kJ g⁻¹), although Calories (kilocalories) are often still used in nontechnical contexts.

单词	calorific value
释义	calorific value Physics The heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram (MJ kg⁻¹). They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units used in this context are kilojoules per gram (kJ g⁻¹), although Calories (kilocalories) are often still used in nontechnical contexts. Calorific values are measured using a bomb calorimeter. Chemistry The heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram (MJ kg⁻¹). They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units here are kilojoules per gram (kJ g⁻¹), although Calories (kilocalories) are often still used in nontechnical contexts. Calorific values are measured using a bomb calorimeter. Chemical Engineering The heating value or heat of combustion of a combustible material in oxygen. Determined using a bomb calorimeter, the calorific value is used as a measure of the energy content of a material such as a hydrocarbon fuel or foodstuff. The calorific values of fuels are usually expressed in joules per unit mass such as MJ kg⁻¹. Hydrocarbon gases such as methane are expressed per unit volume such as MJ m⁻³ with reference to s.t.p. to allow for temperature and pressure variations. Biology The heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram (MJ kg⁻¹). They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units here are kilojoules per gram (kJ g⁻¹), although Calories (kilocalories) are often still used in nontechnical contexts.
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