Question

define combustion,calorie, calorific value

Answer 1

COMBUSTION :

* the process of burning something.
"the combustion of fossil fuels"

*rapid chemical combination of a substance with oxygen, involving the production of heat and light.

CALORIE :

*the energy needed to raise the temperature of 1 kilogram of water through 1 °C, equal to one thousand small calories and often used to measure the energy value of foods.

*he energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).

CALORIFIC VALUE
*the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram.

Answer 2

Noun. calorific value (plural calorific values) The amount of energy produced by the complete combustion of a material or fuel. Measured in units of energy per amount of material, e.g. kJ/kg. The amount of energy available from an item of food when digested, mostly from carbohydrates and fats.