do i look at kj or kcal?
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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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Een kilojoule is gelijk aan 103 J, ofwel 1000 joule. De energie van levensmiddelen (voedingswaarde) wordt uitgedrukt in kilojoule of, als erfenis uit het verleden, in calorieën (1 joule=0,238 845 9 calorie; 1 calorie=4,1868 joule).
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Sometimes the energy content of food is expressed in kilojoules (kj), a metric unit. One kcal equals 4.184 kj. So the Calorie on a food package is 1,000 times larger than the calorie used in chemistry and physics.
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Kcals are exactly what you think of as calories. Just add these two numbers together to get a total calorie burn for the day. For example, in the screenshots above, I burned 634 active (or Move) calories alongside 2,027 resting calories. My total would then be 2,661 calories for the day.
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1 Watt hour (Wh) is equal to 3.6 kilojoules (kJ). To convert watt hours to kilojoules, multiply the watt hour value by 3.6.
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The standard enthalpy of formation is measured in units of energy per amount of substance, usually stated in kilojoule per mole (kJ mol−1), but also in kilocalorie per mole, joule per mole or kilocalorie per gram (any combination of these units conforming to the energy per mass or amount guideline).
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A small calorie (cal) is the amount of energy required to raise the temperature of 1 gram (g) of water by 1º Celsius (º C). A large calorie (kcal) is the amount of energy required to raise 1 kilogram (kg) of water by 1º C. It is also known as a kilocalorie.
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Chemists normally measure energy (both enthalpy and Gibbs free energy) in kJ mol-1 (kilojoules per mole) but measure entropy in J K‑1 mol-1 (joules per kelvin per mole). So it is necessary to convert the units – usually by dividing the entropy values by 1000 so that they are measured in kJ K‑1 mol-1.
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['energy: 0.9 calories.', 'vitamin K: 6.38 micrograms (mcg), or 5% of the Daily Value (DV)', 'vitamin C: 1.74 milligrams (mg), or 2% of the DV.', 'folate: 3.15 mcg, or 1% of the DV.']
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How many kilojoules do I need each day? A kilojoule (like a calorie) is a measure of energy in food. On average, people eat and drink around 8700 kilojoules a day, however we're all different. To maintain your current weight, use your current (actual) body weight in the calculator below.
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Delta G is the measure of the change in free energy in a reaction, so you would use either J or KJ; However, you use KJ/mol or J/mol as the units when in respect to a certain number of moles of the species in the reaction.
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What is the difference between calories and kilocalories? The "calorie" we refer to in food is actually kilocalorie. One (1) kilocalorie is the same as one (1) Calorie (upper case C). A kilocalorie is the amount of heat required to raise the temperature of 1 kilogram of water one degree Celsius.
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Know your numbers. Knowing how many kilojoules your body needs each day is important for weight control. The average adult needs about 8,700 kilojoules (kJ).
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1 calorie = 1 cal = 4,2 joule = 4,2 J. 1 kilowatt = 1000 watt = 1000 joule per seconde = 1000 J/s = 1 kJ/s.
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The prefix "kilo" means 1,000, so one kJ = 1,000 J. As the energies associated with a single molecule or atom are quite small, we often find it easier to discuss the energy found in one mole of the substance, hence "per mole". To get the energy for one molecule, divide kJ/mol by Avogadro's number, 6.022 x 1023.
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1 Joule (J) is equal to 0.001 kilojoule (kJ). To convert joules to kJ, multiply the joule value by 0.001 or divide by 1000. What is a Joule? Joule is a metric system energy unit.
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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.