Energy Exercise 2

2. Convert 686 J to calories. Convert 686 J to Calories.

ANSWERS: 164 calories and 0.164 Calories

SOLUTION:

\(\displaystyle\require{cancel}686\;\cancel{J}\times\frac{1\;cal}{4.184\;\cancel{J}}\;=\;\mathbf{164\;cal}\)

The second part of the question asks to convert 686 J to kcal. Recall, one Calorie is equivalent to one kcal. In part 1, we determined that 686 J = 164 cal. This is equivalent to 0.164 kcal = 0.164 Calories.

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