The unit of heat is equivalent to the engineering unit kilocalorie/kilogram (kilocalorie), which is mostly used in nutrition measurement and fitness manuals.
1kg pure water temperature increases or decreases 1 celsius, and the heat absorbed or released is 1 kcal. A kcal is a kcal (formally, it should be kcal). To evaluate the quality of fuel, one kilogram of fuel can raise x kilograms of water 1 celsius, that is, the calorific value of this fuel is x kcal.
Calorie is the abbreviation of Calorie, which is transliterated from English Calorie. It is defined as the heat required to raise 1 gram of water at 1 atmospheric pressure. Calorie is an energy unit, which is still widely used in nutrition measurement and fitness manuals. The international standard energy unit is Joule.
Calorical is a commonly used term in coal industry. 1000 kcal/kg coal is equivalent to 0. 1 43 kg standard coal.
The usual unit of heat in China is 20℃, that is, the heat required for 1 g pure water to rise from 19.5℃ to 20.5℃.
Its relationship with Joule is: 1 card 20℃=4. 18 16J.
Some countries use the card 15℃. Its relationship with Joule is: 1 card 15℃=4. 1855J.
Some countries use the international steam meter card IT. Its relationship with Joule is: 1 card IT=4. 1868J.