Question

One calorie (cal) equals to how many joules (J)?

• A. 2.18
• B. 4.18
• C. 6.18
• D. 7.18

Hint:

Remember 1 cal = 4.18 J as a standard conversion factor in thermodynamics.

Answer 1

The Correct Option is B

1 calorie is equivalent to 4.18 joules. This is the energy required to raise the temperature of 1 gram of water by 1°C.