Define a calorie.?

Question

Define a calorie.

Answer 1

A calorie is a unit of measurement for energy. Calorie is French and derives from the Latin calor (heat). In most fields, it has been replaced by the joule, the SI unit of energy. However, the kilocalorie or Calorie (capital "C") remains in common use for the amount of food energy.

Definitions for calorie fall into 2 classes:

The small calorie or gram calorie approximates the energy needed to increase the temperature of 1 gram of water by 1 °C. This is about 4.184 joules, and exactly 0.001 large calories.
The large calorie or kilogram calorie approximates the energy needed to increase the temperature of 1 kg of water by 1 °C. This is about 4.184 kJ, and exactly 1000 small calories.
In scientific contexts, the name "calorie" refers strictly to the gram calorie, and this unit has the symbol cal. SI prefixes are used with this name and symbol, so that the kilogram calorie is known as the "kilocalorie" and has the symbol kcal. In non-scientific contexts the kilocalorie is often referred to as a Calorie (capital "C"), or just a calorie, and it has to be inferred from the context that the small calorie is not intended.

Answer 2

A calorie is a unit of measurement for energy. Calorie is French and derives from the Latin calor (heat). In most fields, it has been replaced by the joule, the SI unit of energy. However, the kilocalorie or Calorie (capital "C") remains in common use for the amount of food energy.
Definitions for calorie fall into 2 classes:
The small calorie or gram calorie approximates the energy needed to increase the temperature of 1 gram of water by 1 °C. This is about 4.184 joules, and exactly 0.001 large calories.
The large calorie or kilogram calorie approximates the energy needed to increase the temperature of 1 kg of water by 1 °C. This is about 4.184 kJ, and exactly 1000 small calories....

Answer 3

The amount of heat energy required to raise the temperature of 1 gram of water 1 degree C (I can't remember the specific range, from 24 degrees to 25 sounds familiar, but I can't be sure. Since the specific heat of water varies by temperature).

The colloquial "Calorie" or dietary calorie is a kilocalorie or 1000 calories. Typically calories are used in organic chemistry while joules (the si unit for energy) are used in physical chemistry.

Answer 4

Wikipedia says:
* The small calorie or gram calorie approximates the energy needed to increase the temperature of 1 gram of water by 1 °C. This is about 4.184 joules
* The large calorie or kilogram calorie approximates the energy needed to increase the temperature of 1 kg of water by 1 °C. This is about 4.184 kJ, and exactly 1000 small calories.

The first definition is used in science, the second definition is used for nutrition.

Answer 5

A calorie is the amount of heat needed to raise the temperature of 1 gram of water, 1 degree C.

A Calorie is a kilocalorie, the amount of heat needed to raise te temperature of 1000 grams(1Kg) of water 1 degree C.

Answer 6

Most of the answers are partly correct. The heat definition of the calorie it the amount of heat needed to raise the temperature of 1 gram of water from 14.5 to 15.5 C. The heating curve for water isn't completely linear so it is necessary to specify an exact temperature range to get and exact value.

Answer 7

Calorie is a unit of energy. It applies to anything that possesses energy. For example one ton of coal contains an equivalent energy of 7,004,684,512 calories. While talking in terms of food and drinks, calories refer to the energy stored in the food/drink we eat in the form of carbohydrates, fats and proteins. Energy gives our body the ability to do work. Without calories our body cells and the organs would not function.



Consumption of food depends on one’s general health, physical activity requirements, height and weight. Our body needs calories for energy but at the same time intake of too many calories without much work to do would result in weight gain. One must not be always bothered about the amount of calories they consume but make sure to have a balanced diet at proper intervals. When we eat is as equally important as what we eat.


One gram of carbohydrates contains 4 calories, one gram of protein contains 4 calories and one gram of fat contains 9 calories. So how do these calories help generate energy? Our bodies burn these calories through metabolic processes. The enzymes break the carbohydrates into glucose and other sugars. The fats are broken down into glycerol and fatty acids while the proteins get broken down into amino acids. These molecules are then transported through the bloodstream to the cells, where they are either absorbed for immediate use or sent on to the final stage of metabolism in which they are reacted with oxygen to release their stored energy. When we consume food with little or no nutritional value, they possess empty calories.



When we take in more calories than necessary, it starts to accumulate as body fat. Good physical activities would help your body use up your unnecessary excess fat. Instead of calculating how many calories get added to your diet during every meal, one must make sure to have a balanced diet rich in vitamins and minerals and stay physically active. This would take care of the excess calorie if any in your body and keep you fit.

Answer 8

The amount of energy required to raise by 1 degree Celsius the temperature of 1ml of water.

Answer 9

i guess its meaning from calories from the food you eat i not sure do you know the definition of that question?

Answer 10

The energy needed to increase the temperature of 1g of water by 1 °C.

Nowadays, it is taken as being one thousand times this amount, however.