Question

1. A college student produces about 126 kcal of heat per hour on the average. What is the rate of energy production in joules?
__________kJ/h

2. On a brisk walk, a person burns about 330 Cal/h. At this rate, how many hours of brisk walking would it take to lose 1 lb of body fat? (A pound of body fat stores an amount of chemical energy equivalent to 3,500 Cal.)
__________ h

3.How much heat is necessary to change 495 g of ice at -8°C to water at 20°C?
_____________ kcal

Answer 1

Answer 1 = 527184 J

Answer 2 = 10.606 hours , Answer 3 = 51448.32 cal .