definition of calorie chemistry
c63f83871b05f97bfd371c5cec885cd8
calorie A calorie is the energy that it takes to raise the temperature of 1 gram of water by 1 degree centigrade. More importantly, a calorie is a unit that you can use to measure the energy in your food. From the Latin calor, “to heat,” a calorie is a measurement of heat energy (it may be called a small calorie or a large calorie). When you’re out of the chemistry lab, you’ll most often hear calorie in relation to the energy in food or the energy you burn through exercise. It will also usually be referred to in the plural, as calories.
dbdfa6711b8481735258345eeff2a3ce
calorie n. 1. (Units) Also called: kilogram calorie, kilocalorie or large calorie a unit of heat, equal to one thousand calories, often used to express the heat output of an organism or the energy value of food.
49d27a0d9c17b9b2d98fb277e404d917
Top 20 Doctor insights on: How Many Calories Are In 2 Boiled Eggs Calorie (Definition) 1  A calorie is the amount of heat energy needed to increase a mililiter of water 1 degree centigrade, the calorie we talk about in foods is really a kilocalorie, that is the amount of energy needed to increase a liter of water 1 degree centigrade... 2  See a dietian: See dietian for advice.
2d66254c640a40973f9e092dc25977b3
Calories Nutrients or Food? One calorie is the amount of heat needed to raise the temperature of 1 gram of water by 1 degree Celsius. Fascinating stuff, this nutritional science. You’ll also frequently see kilocalorie (kcal) used. Technically one kcal is equal to 1000 calories (kilo = 1000).
933ef8255885caeb4c8da286d0b1021d
Calorimetry Calorimetry is the science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints. Calorimetry is performed with a calorimeter.
8660df37b8f7da8fc4c8a8fec1960ada
Calorie Another calorie, a unit of heat energy, is the International Table calorie (IT calorie), originally defined as 1/860 international watt-hour. It is equal to 4.1868 joules and is used in engineering steam tables. A unit of heat energy used in thermochemistry is the thermochemical calorie, equal to 4.184 joules.
75b900747f31cc9760ca19ca3c9908f1
What is the scientific definition of calorie? Report Abuse. There are 8 definitions of calorie. The most classical is: the amount of energy needed to raise the temperature of 1 gram of water from 14.5°C to 15.5°C at standard conditions (101.325 kPa)..
05c5c98c47b0fb8ab1e6b17f89bcaddc
- Calories and Joules. In chemistry we measure heat using two different units: calories and joules. A calorie is defined as the amount of energy needed to raise the temperature of one gram of water one degree Celsius. The “calorie” you are most familiar with is used to measure the energy content of food.
6744f41e6d101a610e1671e5aa5440e5
How do they actually measure the calorie content for different foods? One calorie is the amount of energy required to raise the temperature of one gram of water by one degree, which ~4.2 joules. Food calories are actually kilocalories, so 1 food calorie = 1000 calories. I'm sure there are more modern ways to do this, but I am not aware of how they work. Views · View Upvotes.
04248c60869a07c898a69ad2e3aefad4
- Various definitions exist but fall into two broad categories. 1  The small calorie or gram calorie (symbol: cal) is the approximate amount of energy needed to raise the temperature of one gram of water by one degree Celsius at a pressure of one atmosphere.
15fb62adb197c70e2f4fa08be24d75a0
What Is a Calorie? A calorie is the amount of heat needed to raise the temperature of one gram of water by one degree Celsius. Calories in food provide energy in the form of heat so that our bodies can function. Our bodies store and burn calories as fuel. Many dieters count calories and try to decrease caloric intake to lose weight.
0008b8a6cd32c96febb465466ebb8b1b
Nutrition chapter 1 What is the definition of the units by which energy is measured? Energy provided by food and beverages is measured in kilocalories, abbreviated kcalories or kcal. One kcalories is the amount of heat nessary to raise the temperature of 1 kilogram of water 1'C. The scientific use of the term kcalorie is the same as the popular use of the term calorie. Calories.
513b289f89776a6afc6baebd7bab4a8a
- A Calorie (kilocalorie) is 1000 calories. 2. (cal) A measure of heat energy representing the amount of heat needed to raise the temperature 1 g of water by 1°C. Also called “small calorie”: 1000 cal = 1 kcal or Cal. See joule, kilocalorie.
009eb730fa57694374a4d05cb3ea2091
Calorie The factor used to convert calories to joules at a given temperature is numerically equivalent to the specific heat capacity of water expressed in joules per kelvin per gram or per kilogram. The precise conversion factor depends on the definition adopted. In spite of its non-official status, the large calorie is still widely used as a unit of food energy. The small calorie is also often used for measurements in chemistry, although the amounts involved are typically recorded in kilocalories.
5a746c62c4b5841638654af4931a7819
Calorie and Kilojoules: What Exactly Are They? A calorie is a unit of energy. Technically a calorie is the amount of heat energy required to raise the temperature of 1 gram of water up 1 degree Celsius (1.8 degrees Fahrenheit).When applied to food, we are actually talking about a kiloCalorie (1000 calories). calorie is a unit of energy. Technically a calorie is the amount of heat energy required to raise the temperature of 1 gram of water up 1 degree Celsius (1.8 degrees Fahrenheit).
460bc85ac4dc38a59ab8646a17b5672b
- Share. By Anne Marie Helmenstine, Ph.D. Definition: A calorie is a unit of thermal energy equal to 4.184 joules or the amount of energy required to raise the temperature of 1 gram of liquid water 1°C at standard pressure.Return to the Chemistry Glossary Index.y Anne Marie Helmenstine, Ph.D. Definition: A calorie is a unit of thermal energy equal to 4.184 joules or the amount of energy required to raise the temperature of 1 gram of liquid water 1°C at standard pressure. Return to the Chemistry Glossary Index.
8d1a2ac44374419576c7924878afa7a2
calorie Calorie (Cal, kcal), 1 the amount of heat (energy) needed to raise the temperature of 1 kg of water 1° C. 2 a unit, equal to the large calorie, used to denote the heat expenditure of an organism and the fuel or energy value of food. Also called great calorie, kilocalorie, kilogram calorie, kcalorie, large calorie.
4433df4ffab7fd7ac4a811bcf22d4d2d
Measurement of Energy 1 calorie = 0.003969 BTUs. Food Calorie, Kilocalorie or large calorie (Cal, kcal, Calorie) The amount of energy needed to raise the temperature of one kilogram of water one degree Celsius. The food calorie is often used when measuring the energy content of food.
6afe8e84457575316873b59660c4b7ac
- ENERGY. Definitions of the Calorie The calorie (cal symbol) (from the Latin calor, heat) is a unit of heat energy defined (calorie at 15°C) like the amount of heat (or heat energy) required to raise the temperature of one gram of water from. to 15.5 ° C under normal atmospheric pressure (1 atm or 101,325 kPa).
592b2b57aa09f3082db1aba20596bed4
- 4 186 joule 1 calories another common energy unit is the calorie the calorie cal is defined as the amount of energy heat needed to increase the temperature of one gram of water by 1oc
5f8a037a7ddbc92f2b7f388122bf9b45
How Many Joules Are in a Calorie? Full Answer. A calorie is a unit of energy that measures how much energy is needed to increase the temperature of a single gram of water. The primary measure of energy, however, is the joule, which is equal to one newton-meter. It is the standard unit of energy in both the imperial and metric system.
4073d158fc1b77a33f24a0a39a3a5365
- The SI energy unit is the joule. 4.186 Joule = 1 calories. Another common energy unit is the calorie. The calorie, cal, is defined as the amount of energy (heat) needed to increase the temperature of one gram of water by 1oC. The kilocalorie, kcal, equals 1000 small calories. To make life more complicated Nutritional energy values are reported in dietetic calories or the big Calorie.
5fe68bcd8421f91ca9d84067c46a7e11
Principles of Biomedical Science End of Course Review PBS Activity Introductions A calorie, or kilocalorie, is a unit used to measure energy. Specifically, a calorie is the amount of energy needed to raise 1 kg of water by 1 degree Celsius. Calories in our diet come from fat, protein, carbohydrates, and alcohol. Carbohydrates and protein contain 4 calories per gram. Each gram of alcohol contains 7 calories.
51b224d834ef3a2c09d56f4484e8cc94
- One kilogram calorie (kcal, also known as a 'food calorie' or (capital C) Calorie) is the amount of energy required to raise the temperature of one litre (or one kilogram) of water by 1 degree Celsius.
250c4066820e584ccfa026b8386869db
Calorimetry Calorimetry. Calorimetry is the measurement of the quantity of heat exchanged. For example, if the energy from an exothermic chemical reaction is absorbed in a container of water, the change in temperature of the water provides a measure of the amount of heat added.or example, if the energy from an exothermic chemical reaction is absorbed in a container of water, the change in temperature of the water provides a measure of the amount of heat added.
866859a14566671b48bcad96a76e4533
calorie any of several units of heat defined as the amount of heat required to raise the temperature of 1 kilogram of water by 1 degree Celsius (1°C) at a specified temperature. The calorie used in chemistry and biochemistry is equal to 4.184 joules. Symbol cal. See also nutrition.