Question

The average adult human burns 2.00 x 10^3 kcal per day in energy. What is this rate in kJ per hour?

Answer 1

The average adult human burns approximately 348.833 kJ per hour, given the average daily energy expenditure of 2.00 x 10^3 kcal and using the conversion factor of 1 kcal = 4186 J.

Step-by-step explanation:

To convert the average adult human energy expenditure of 2.00 x 103 kcal per day to kJ per hour, we start with the given value and apply the conversion factor between kcal and Joules. This factor is 1 kcal = 4186 J.

Firstly, we convert kcal to kJ:

1. 2.00 x 103 kcal/day x 4186 J/kcal = 8.372 x 106 J/day
2. Convert J to kJ: 8.372 x 106 J/day / 1000 = 8372 kJ/day

Next, we determine the number of hours in a day, which is 24, to find the rate per hour:

1. 8372 kJ/day / 24 hours/day = 348.833 kJ/hour

Thus, the average energy burned by an adult human is approximately 348.833 kJ per hour.