Units of energy- A calorie(cal) is equivalent to the amount of heat required to raise the temperature of I gram of water from 14.5"C to15.5°C. a kilocalorie(kcal) is equal to 1000 cal A joule(d) is the amount of energy needed to apply a I newton force over a distance of I meter. A Kilojoule (k]) is equal to1000 I kcal= 4.184