1 calorie is equal to ________


1 calorie is equal to ________
A. 4.18 J
B. 5.23 J
C. 6.23 J
D. 8 J
The correct answer is A. 4.18 J

The calorie is the unit of energy. It is equal to 4.18 Joule. It is the amount of heat energy required to raise the temperature of one 1 g of water by 1° Celsius.