Which statement correctly defines a large Calorie (Calorie)?

• A. The amount of heat energy that will raise 1 gram of water 1°C.
• B. The amount of heat energy to raise 1 liter of water by 1°C.
• C. The amount of heat energy to raise 1000 grams of water by 1°F.
• D. The amount of heat energy that will raise 1 kilogram of water 1°C.

Answer: (D)

A large Calorie is a kilocalorie—the amount of heat required to raise the temperature of 1 kilogram of water by 1°C. It equals 1000 small calories and is the unit used on food energy labels (about 4184 joules). This definition matches the statement that uses 1 kilogram of water and 1°C. The other options describe the smaller calorie (1 gram by 1°C), or mix units like Fahrenheit or mass with a different amount of water (1000 grams) or use a liter instead of a kilogram; for precision in this context, the kilogram-1°C definition is the standard.