what is the difference between joules and calories?
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Calorie. ... The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1° Celsius. Since 1925 this calorie has been defined in terms of the joule, the definition since 1948 being that one calorie is equal to approximately 4.2 joules.
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A calorie is a unit of measure of the energy required to raise the temperature of 1 gram of water by 1 degree C. A joule is a unit of electrical energy, commonly used in the physical sciences, equal to the work done when a current of one ampere is passed through a resistance of one ohm for one second.
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A calorie is a unit of energy. In nutrition, calories refer to the energy people get from the food and drink they consume, and the energy they use in physical activity. Calories are listed in the nutritional information on all food packaging.
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A calorie is simply a unit of energy, so the number of calories you burn during exercise is actually a measure of the energy required to move your body. Larger people require more energy to move their bodies, so you'll typically burn more calories at a heavier weight.
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The joule (symbol J) is the SI unit of energy—a measure of the capacity to do work or generate heat. One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). ... Therefore, one joule equals one newton•meter.
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Both enthalpy and energy are measured in joules, which already suggests that they are about the same thing. Formally there is a difference, as the formula for enthalpy (H) is: H = E + PV, where E=energy, P=pressure and V=volume.
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The joule (symbol J) is the SI unit of energy—a measure of the capacity to do work or generate heat. One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). ... The amount of energy delivered by a one watt source of power in one second is one Joule.
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What is the difference between calories and kilocalories? The "calorie" we refer to in food is actually kilocalorie. ... A kilocalorie is the amount of heat required to raise the temperature of 1 kilogram of water one degree Celsius.
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"A calorie is a calorie is a calorie," they say — that it doesn't matter whether you eat a 100 calories of candy or broccoli, they will have the same effect on your weight. It's true that all calories have the same amount of energy. One dietary calorie contains 4,184 Joules of energy.
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A calorie is a measure of energy expenditure and stored energy. The calories referred to in diet (calories eaten) and exercise (calories burned) are kilocalories (kcal). One kilocalorie is equal to the amount of heat that will raise the temperature of one kilogram of water by one degree Celsius at sea level.
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More information from the unit converter How many kcal in 1 gram calorie? The answer is 0.001. We assume you are converting between kilocalorie [15 °C] and gram calorie. You can view more details on each measurement unit: kcal or gram calorie The SI derived unit for energy is the joule.
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Checking calories in food The calorie content is often given in kcals, which is short for kilocalories, and also in kJ, which is short for kilojoules. A kilocalorie is another word for what's commonly called a calorie, so 1,000 calories will be written as 1,000kcals. Kilojoules are the metric measurement of calories.
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One calorie has the same energy value as 4.186 joules. It takes 3,500 calories to equal one pound of body weight. The energy value per GRAM of various food components includes: Water = 0kJ (0 Cal)
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The unit of measurement for enthalpy in the International System of Units (SI) is the joule.
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They are both units of energy, but the dietary Calorie (note the use of upper case 'C') equals 1000 'physics' calories. The physics calorie represents an amount of energy needed to raise (or lower) one gram of liquid water by one centigrade degree.
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Units. The SI unit of electric potential energy is joule (named after the English physicist James Prescott Joule). In the CGS system the erg is the unit of energy, being equal to 10−7 J.
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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 other unit used to measure heat is the joule. The joule is the SI (System International) unit.