Q: Are calories units of energy? ¶
Q: Was calorie first defined specifically to measure energy in the form of heat? ¶
A: Yes, and especially in experimental calorimetry.
Q: Is calorie deemed obsolete in science after the SI system was adopted in the 1950s? ¶
Q: Is calorie still in common use? ¶
Q: Is calorie approximately 4.2 joules? ¶
A: Yes, 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.
Q: Was calorie first defined by Nicolas Clément in 1824 as a unit of heat energy and entered French and English dictionaries between 1841 and 1867? ¶
Q: Is calorie also often used for measurements in chemistry? ¶
A: Yes, although the amounts involved are typically recorded in kilocalories.
Q: Is calorie still widely used as a unit of food energy? ¶
Q: Is calorie popularly used with the number of kilocalories of nutritional energy measured? ¶