Final answer:
A kilocalorie is the amount of energy needed to change the temperature of 1 kilogram of water by 1 degree Celsius. It is commonly used to measure the energy the body uses during all activities and metabolic processes.
Step-by-step explanation:
A kilocalorie is the amount of energy needed to change the temperature of 1 kilogram of water by 1 degree Celsius between 14.5°C and 15.5°C. This unit of heat is commonly used to measure the energy the body uses during all activities and metabolic processes. In chemistry and biochemistry, one calorie (spelled with a lowercase c) is defined as the energy required to raise the temperature of one gram of water by one degree Celsius. Nutritionists and weight-watchers tend to use the dietary calorie, which is frequently called a Calorie (spelled with a capital C). One food Calorie is the energy needed to raise the temperature of one kilogram of water by one degree Celsius.