A calorie is defined as exactly 4.184 J.Therefore 1.000 Cal is exactly
A)41.84 J.
B)418.4 J.
C)1000 J.
D)4184 J.

Question

Quizplus · Accepted Answer

To convert from calories to joules, we need to multiply the number of calories by 4.184. Hence, to convert from calories to kilojoules, we need to multiply the number of calories by 4.184 × 10^-3 or divide it by 238.8459. Thus, 1.000 Cal (kilocalorie) is equal to 1000 cal × 4.184 J/cal, which is equal to 4184 J. Therefore, the correct answer is D.

A Calorie Is Defined as Exactly 4