Calories consumed

Calorie is a unit of energy. Although the international standard unit of energy is joule, more countries use calorie. This unit is widely used in the diet and weight loss industries. For many foods, calories are used to calculate their energy content. For those who are losing weight, they are very sensitive to the term calorie. They almost don't want to eat foods with high calorie content for fear of gaining weight. Energy consumption is also calculated using calories.

People often mention calories as a unit of energy in their daily lives, and some foods are often labeled with the number of calories they contain. However, when asked how much a calorie is, few people can answer. The following introduces the concept of calories to help you better calculate calorie consumption.

Calories actually they apply to anything that contains energy. For example, 4 liters of gasoline contains about 31 million calories of energy. With the calories in 217 Big Macs, you could drive 22 miles.

Simply put, one calorie of energy or heat is enough to raise the temperature of one gram of water at one atmosphere of pressure by one degree Celsius. 1 calorie is approximately equal to 4.186 joules (joule is a commonly used unit of energy in physics).

Most of us associate calories with something we eat or drink, as in, "This can of soda has 200 calories." In fact, the calories listed on food packaging are kilocalories, also written as capital C, which is equivalent to the heat required to raise the temperature of 1000 grams of water from 14.5 degrees Celsius to 15.5 degrees Celsius at 1 atmosphere of pressure, which is approximately equal to 4186 joules of internal energy. (1000 calories = 1 kcal). So, in reality, that can of soda contains 200,000 calories (but don't worry, this also applies to exercise - when the exercise chart says you burn 100 calories by jogging 2 kilometers, it means 100,000 calories). In English, "calorie" (with a lowercase first letter) means calorie, which is approximately equal to 4.186 joules, and "Calorie" (with a capital first letter) means kcal, which is approximately equal to 4186 joules.

Since scientists later discovered that the specific heat capacity of water is different at different temperatures, the following different definitions were derived:

"15-degree calories" used in nutrition: the heat required to raise the temperature of 1 gram of water from 14.5°C to 15.5°C under 1 atmosphere of pressure is approximately equal to 4.1855 joules.

"4 degree calorie": the heat required to raise the temperature of 1 gram of water from 3.5℃ to 4.5℃ at 1 atmosphere of pressure.

"Average Calories" refers to the average number of calories per degree required to raise the temperature of 1 gram of water from 0°C to 100°C at 1 atmosphere of pressure, which is approximately equal to 4.190 joules.

The International Steam Table calorie is approximately 4.1868 joules.

Thermodynamics and chemistry use the term "thermochemical calorie", which is approximately 4.184 joules.

There are two types of calories:

Kilocalorie, also written as capital C, is most commonly seen on food labels. It is equivalent to the amount of heat required to raise the temperature of 1000 grams of water from 14.5°C to 15.5°C at 1 atmosphere of pressure, which is approximately equal to 4186 joules of internal energy.

Calories, also called cal, are more common in scientific research documents. 1000 Calories = 1 Calorie

Through the above introduction to calories, I believe you can better calculate your calorie consumption. For those who want to lose weight, you should understand these concepts and conversions better. When eating, learn more about how many calories the food contains, convert it into food units, and decide how much you should eat. Such scientific and calculated eating will definitely play a good role in weight loss.