Final answer:
The statement is false; a kilocalorie is the energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius between 14.5°C and 15.5°C, not at 38°C as stated.
Step-by-step explanation:
The statement presented in the question is false. A calorie (with a lowercase 'c') is the amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius. A kilocalorie or Calorie (with an uppercase 'C'), also known as a 'food calorie', is the amount of heat required to raise the temperature of 1 kilogram of water by 1 degree Celsius. The specific temperature range for a kilocalorie is between 14.5°C and 15.5°C. So, a kilocal is not defined at 38 degrees Celsius.
A kilocalorie (kcal) is the amount of energy needed to change the temperature of 1.00 kg of water by 1.00°C. It is a common unit of heat used in chemistry and biochemistry. Kilocalories are often used in food labeling and are equal to 1000 calories.